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Wikipedia

Istanbul

Istanbul (/ˌɪstænˈbʊl/ IST-an-BUUL,[8][9] US also /ˈɪstænbʊl/ IST-an-buul; Turkish: İstanbul [isˈtanbuɫ] ), formerly known as Constantinople,[b] is the largest city in Turkey, serving as the country's economic, cultural and historic hub. The city straddles the Bosporus Strait, lying in both Europe and Asia, and has a population of over 15 million residents, comprising 19% of the population of Turkey.[4] Istanbul is the most populous European city[c] and the world's 15th-largest city.

Istanbul
İstanbul
OpenStreetMap
Istanbul
Location within Turkey
Istanbul
Location within Europe
Istanbul
Location within Asia
Coordinates: 41°00′49″N 28°57′18″E / 41.01361°N 28.95500°E / 41.01361; 28.95500
Country Turkey
RegionMarmara
ProvinceIstanbul
Provincial seat[a]Cağaloğlu, Fatih
Districts39
Government
 • TypeMayor–council government
 • BodyMunicipal Council of Istanbul
 • MayorEkrem İmamoğlu (CHP)
Area
 • Urban
2,576.85 km2 (994.93 sq mi)
 • Metro
5,343.22 km2 (2,063.03 sq mi)
Highest elevation537 m (1,762 ft)
Population
 (31 December 2022)[4]
 • Metropolitan municipality and province15,907,951
 • Rank1st in Turkey
1st in Europe
 • Urban
15,569,856
 • Urban density6,042/km2 (15,650/sq mi)
 • Metro density2,977/km2 (7,710/sq mi)
Demonym(s)Istanbulite
(Turkish: İstanbullu)
GDP Nominal (2022)
 • Total$276 billion (30.4% of Turkey)
 • Per capita$17,349
Time zoneUTC+3 (TRT)
Postal code
34000 to 34990
Area codes+90 212 (European side)
+90 216 (Asian side)
Vehicle registration34
HDI (2021)0.867[7] (very high) · 1st
GeoTLD.ist, .istanbul
Website
  • ibb.istanbul
  • istanbul.gov.tr
Official nameHistoric Areas of Istanbul
CriteriaCultural: (i)(ii)(iii)(iv)
Reference356bis
Inscription1985 (9th Session)
Extensions2017
Area765.5 ha (1,892 acres)

The city was founded as Byzantium (Greek: Βυζάντιον, Byzantion) in the 7th century BCE by Greek settlers from Megara.[10] In 330 CE, the Roman emperor Constantine the Great made it his imperial capital, renaming it first as New Rome (Greek: Νέα Ῥώμη, Nea Rhomē; Latin: Nova Roma)[11] and then as Constantinople (Constantinopolis) after himself.[11][12] In 1930, the city's name was officially changed to Istanbul, the Turkish rendering of εἰς τὴν Πόλιν (romanized: eis tḕn Pólin; 'to the City'), the appellation Greek speakers used since the 11th century to colloquially refer to the city.[11]

The city served as an imperial capital for almost 1600 years: during the Roman/Byzantine (330–1204), Latin (1204–1261), late Byzantine (1261–1453), and Ottoman (1453–1922) empires.[13] The city grew in size and influence, eventually becoming a beacon of the Silk Road and one of the most important cities in history. The city played a key role in the advancement of Christianity during Roman/Byzantine times, hosting four of the first seven ecumenical councils before its transformation to an Islamic stronghold following the Fall of Constantinople in 1453 CE—especially after becoming the seat of the Ottoman Caliphate in 1517.[14] In 1923, after the Turkish War of Independence, Ankara replaced the city as the capital of the newly formed Republic of Turkey.

Istanbul has surpassed London and Dubai to become the most visited city in the world, with more than 20 million foreign visitors in 2023.[15] The historic centre of Istanbul is a UNESCO World Heritage Site, and the city hosts the headquarters of numerous Turkish companies, accounting for more than thirty percent of the country's economy.[16][17]

Toponymy

 
Column of Constantine[18]

The first known name of the city is Byzantium (Greek: Βυζάντιον, Byzántion), the name given to it at its foundation by Megarian colonists around 657 BCE.[11][19] Megarian colonists claimed a direct line back to the founders of the city, Byzas, the son of the god Poseidon and the nymph Ceroëssa.[19] Modern excavations have raised the possibility that the name Byzantium might reflect the sites of native Thracian settlements that preceded the fully-fledged town.[20] Constantinople comes from the Latin name Constantinus, after Constantine the Great, the Roman emperor who refounded the city in 324 CE.[19] Constantinople remained the most common name for the city in the West until the 1930s, when Turkish authorities began to press for the use of "Istanbul" in foreign languages. Ḳosṭanṭīnīye (Ottoman Turkish: قسطنطينيه) and İstanbul were the names used alternatively by the Ottomans during their rule.[21]

The name İstanbul (Turkish pronunciation: [isˈtanbuɫ] , colloquial Turkish pronunciation: [ɯsˈtambuɫ]) is commonly held to derive from the Medieval Greek phrase "εἰς τὴν Πόλιν" (pronounced Greek pronunciation: [is tim ˈbolin]), which means "to the city"[22] and is how Constantinople was referred to by the local Greeks. This reflected its status as the only major city in the vicinity. The importance of Constantinople in the Ottoman world was also reflected by its nickname Der Saadet meaning the 'Gate to Prosperity' in Ottoman Turkish.[23] An alternative view is that the name evolved directly from the name Constantinople, with the first and third syllables dropped.[19] Some Ottoman sources of the 17th century, such as Evliya Çelebi, describe it as the common Turkish name of the time; between the late 17th and late 18th centuries, it was also in official use. The first use of the word Islambol (Ottoman Turkish: اسلامبول) on coinage was in 1730 during the reign of Sultan Mahmud I.[24] In modern Turkish, the name is written as İstanbul, with a dotted İ, as the Turkish alphabet distinguishes between a dotted and dotless I. In English the stress is on the first or last syllable, but in Turkish it is on the second syllable (-tan-).[25] A person from the city is an İstanbullu (plural: İstanbullular); Istanbulite is used in English.[26]

History

 
This large keystone might have belonged to a triumphal arch at the Forum of Constantine (present-day Çemberlitaş).[18]
Historical affiliations

Byzantium 667 BC–510 BC
  Persian Empire 512 BC–478 BC
Byzantium (Under Athens) 478 BC–404 BC
Byzantium 404 BC–196 CE
  Roman Empire 196–395 (Capital between 330–395)
  Byzantine Empire 395–1204
  Latin Empire 1204–1261
  Byzantine Empire 1261–1453
  Ottoman Empire 1453–1918
     Occupation of Istanbul 1918–1923
  Ankara Government 1923
  Turkey 1923–Present

Neolithic artifacts, uncovered by archeologists at the beginning of the 21st century, indicate that Istanbul's historic peninsula was settled as far back as the 6th millennium BCE.[27] That early settlement, important in the spread of the Neolithic Revolution from the Near East to Europe, lasted for almost a millennium before being inundated by rising water levels.[28][27][29][30] The first human settlement on the Asian side, the Fikirtepe mound, is from the Copper Age period, with artifacts dating from 5500 to 3500 BCE,[31] On the European side, near the point of the peninsula (Sarayburnu), there was a Thracian settlement during the early 1st millennium BCE. Modern authors have linked it to the Thracian toponym Lygos,[32] mentioned by Pliny the Elder as an earlier name for the site of Byzantium.[33]

The history of the city proper begins around 660 BCE,[11][34][d] when Greek settlers from Megara established Byzantium on the European side of the Bosporus. The settlers built an acropolis adjacent to the Golden Horn on the site of the early Thracian settlements, fueling the nascent city's economy.[40] The city experienced a brief period of Persian rule at the turn of the 5th century BCE, but the Greeks recaptured it during the Greco-Persian Wars.[41] Byzantium then continued as part of the Athenian League and its successor, the Second Athenian League, before gaining independence in 355 BCE.[42] Long allied with the Romans, Byzantium officially became a part of the Roman Empire in 73 CE.[43] Byzantium's decision to side with the Roman usurper Pescennius Niger against Emperor Septimius Severus cost it dearly; by the time it surrendered at the end of 195 CE, two years of siege had left the city devastated.[44] Five years later, Severus began to rebuild Byzantium, and the city regained—and, by some accounts, surpassed—its previous prosperity.[45]

Rise and fall of Constantinople and the Byzantine Empire

 
Originally built by Constantine the Great in the 4th century and later rebuilt by Justinian the Great after the Nika riots in 532, the Hagia Irene is an Eastern Orthodox Church located in the outer courtyard of Topkapı Palace in Istanbul. It is one of the few Byzantine era churches that were never converted into mosques; during the Ottoman period it served as Topkapı's principal armoury.
 
Originally a church, later a mosque, the 6th-century Hagia Sophia (532–537) by Byzantine emperor Justinian the Great was the largest cathedral in the world for nearly a thousand years, until the completion of the Seville Cathedral (1507) in Spain.

Constantine the Great effectively became the emperor of the whole of the Roman Empire in September 324.[46] Two months later, he laid out the plans for a new, Christian city to replace Byzantium. As the eastern capital of the empire, the city was named Nova Roma; most called it Constantinople, a name that persisted into the 20th century.[47] On 11 May 330, Constantinople was proclaimed the capital of the Roman Empire, which was later permanently divided between the two sons of Theodosius I upon his death on 17 January 395, when the city became the capital of the Eastern Roman (Byzantine) Empire.[48]

The establishment of Constantinople was one of Constantine's most lasting accomplishments, shifting Roman power eastward as the city became a center of Greek culture and Christianity.[48][49] Numerous churches were built across the city, including Hagia Sophia which was built during the reign of Justinian the Great and remained the world's largest cathedral for a thousand years.[50] Constantine also undertook a major renovation and expansion of the Hippodrome of Constantinople; accommodating tens of thousands of spectators, the hippodrome became central to civic life and, in the 5th and 6th centuries, the center of episodes of unrest, including the Nika riots.[51][52] Constantinople's location also ensured its existence would stand the test of time; for many centuries, its walls and seafront protected Europe against invaders from the east and the advance of Islam.[49] During most of the Middle Ages, the latter part of the Byzantine era, Constantinople was the largest and wealthiest city on the European continent and at times the largest in the world.[53][54] Constantinople is generally considered to be the center and the "cradle of Orthodox Christian civilization".[55][56]

Constantinople began to decline continuously after the end of the reign of Basil II in 1025. The Fourth Crusade was diverted from its purpose in 1204, and the city was sacked and pillaged by the crusaders.[57] They established the Latin Empire in place of the Orthodox Byzantine Empire.[58] Hagia Sophia was converted to a Catholic church in 1204. The Byzantine Empire was restored, albeit weakened, in 1261.[59] Constantinople's churches, defenses, and basic services were in disrepair,[60] and its population had dwindled to a hundred thousand from half a million during the 8th century.[e] After the reconquest of 1261, however, some of the city's monuments were restored, and some, like the two Deesis mosaics in Hagia Sophia and Kariye, were created.[61]

 
The 6th century Basilica Cistern was built by Justinian the Great.

Various economic and military policies instituted by Andronikos II, such as the reduction of military forces, weakened the empire and left it vulnerable to attack.[62] In the mid-14th-century, the Ottoman Turks began a strategy of gradually taking smaller towns and cities, cutting off Constantinople's supply routes and strangling it slowly.[63] On 29 May 1453, after an eight-week siege (during which the last Roman emperor, Constantine XI, was killed), Sultan Mehmed II "the Conqueror" captured Constantinople and declared it the new capital of the Ottoman Empire. Hours later, the sultan rode to the Hagia Sophia and summoned an imam to proclaim the Islamic creed, converting the grand cathedral into an imperial mosque due to the city's refusal to surrender peacefully.[64] Mehmed declared himself as the new Kayser-i Rûm (the Ottoman Turkish equivalent of the Caesar of Rome) and the Ottoman state was reorganized into an empire.[65][66]

Ottoman Empire and Turkish Republic eras

 
Map of Istanbul in the 16th century by the Ottoman polymath Matrakçı Nasuh

Following the conquest of Constantinople,[f] Mehmed II immediately set out to revitalize the city. Cognizant that revitalization would fail without the repopulation of the city, Mehmed II welcomed everyone–foreigners, criminals, and runaways– showing extraordinary openness and willingness to incorporate outsiders that came to define Ottoman political culture.[68] He also invited people from all over Europe to his capital, creating a cosmopolitan society that persisted through much of the Ottoman period.[69] Revitalizing Istanbul also required a massive program of restorations, of everything from roads to aqueducts.[70] Like many monarchs before and since, Mehmed II transformed Istanbul's urban landscape with wholesale redevelopment of the city center.[71] There was a huge new palace to rival, if not overshadow, the old one, a new covered market (still standing as the Grand Bazaar), porticoes, pavilions, walkways, as well as more than a dozen new mosques.[70] Mehmed II turned the ramshackle old town into something that looked like an imperial capital.[71]

Social hierarchy was ignored by the rampant plague, which killed the rich and the poor alike in the 16th century.[72] Money could not protect the rich from all the discomforts and harsher sides of Istanbul.[72] Although the Sultan lived at a safe remove from the masses, and the wealthy and poor tended to live side by side, for the most part Istanbul was not zoned as modern cities are.[72] Opulent houses shared the same streets and districts with tiny hovels.[72] Those rich enough to have secluded country properties had a chance of escaping the periodic epidemics of sickness that blighted Istanbul.[72]

 
View of the Golden Horn and the Seraglio Point from Galata Tower

The Ottoman Dynasty claimed the status of caliphate in 1517, with Constantinople remaining the capital of this last caliphate for four centuries.[14] Suleiman the Magnificent's reign from 1520 to 1566 was a period of especially great artistic and architectural achievement; chief architect Mimar Sinan designed several iconic buildings in the city, while Ottoman arts of ceramics, stained glass, calligraphy, and miniature flourished.[73] The population of Constantinople was 570,000 by the end of the 18th century.[74]

A period of rebellion at the start of the 19th century led to the rise of the progressive Sultan Mahmud II and eventually to the Tanzimat period, which produced political reforms and allowed new technology to be introduced to the city.[75] Bridges across the Golden Horn were constructed during this period,[76] and Constantinople was connected to the rest of the European railway network in the 1880s.[77] Modern facilities, such as a water supply network, electricity, telephones, and trams, were gradually introduced to Constantinople over the following decades, although later than to other European cities.[78] The modernization efforts were not enough to forestall the decline of the Ottoman Empire.[79]

 
 
Two aerial photos showing the Golden Horn and the Bosporus, taken from a German zeppelin on 19 March 1918

Sultan Abdul Hamid II was deposed with the Young Turk Revolution in 1908 and the Ottoman Parliament, closed since 14 February 1878, was reopened 30 years later on 23 July 1908, which marked the beginning of the Second Constitutional Era.[80] A series of wars in the early 20th century, such as the Italo-Turkish War (1911–1912) and the Balkan Wars (1912–1913), plagued the ailing empire's capital and resulted in the 1913 Ottoman coup d'état, which brought the regime of the Three Pashas.[81]

The Ottoman Empire joined World War I (1914–1918) on the side of the Central Powers and was ultimately defeated. The deportation of Armenian intellectuals on 24 April 1915 was among the major events which marked the start of the Armenian genocide during WWI.[82] Due to Ottoman and Turkish policies of Turkification and ethnic cleansing, the city's Christian population declined from 450,000 to 240,000 between 1914 and 1927.[83] The Armistice of Mudros was signed on 30 October 1918 and the Allies occupied Constantinople on 13 November 1918. The Ottoman Parliament was dissolved by the Allies on 11 April 1920 and the Ottoman delegation led by Damat Ferid Pasha was forced to sign the Treaty of Sèvres on 10 August 1920.[citation needed]

 
A view of Bankalar Caddesi (Banks Street) in the late 1920s. Completed in 1892, the Ottoman Bank headquarters is seen at left. In 1995 the Istanbul Stock Exchange moved to İstinye, while numerous Turkish banks have moved to Levent and Maslak.[84]

Following the Turkish War of Independence (1919–1922), the Grand National Assembly of Turkey in Ankara abolished the Sultanate on 1 November 1922, and the last Ottoman Sultan, Mehmed VI, was declared persona non grata. Leaving aboard the British warship HMS Malaya on 17 November 1922, he went into exile and died in Sanremo, Italy, on 16 May 1926. The Treaty of Lausanne was signed on 24 July 1923, and the occupation of Constantinople ended with the departure of the last forces of the Allies from the city on 4 October 1923.[85] Turkish forces of the Ankara government, commanded by Şükrü Naili Pasha (3rd Corps), entered the city with a ceremony on 6 October 1923, which has been marked as the Liberation Day of Istanbul (Turkish: İstanbul'un Kurtuluşu) and is commemorated every year on its anniversary.[85] On 29 October 1923 the Grand National Assembly of Turkey declared the establishment of the Turkish Republic, with Ankara as its capital. Mustafa Kemal Atatürk became the Republic's first President.[86][87]

A 1942 wealth tax assessed mainly on non-Muslims led to the transfer or liquidation of many businesses owned by religious minorities.[88] From the late 1940s and early 1950s, Istanbul underwent great structural change, as new public squares, boulevards, and avenues were constructed throughout the city, sometimes at the expense of historical buildings.[89] The population of Istanbul began to rapidly increase in the 1970s, as people from Anatolia migrated to the city to find employment in the many new factories that were built on the outskirts of the sprawling metropolis. This sudden, sharp rise in the city's population caused a large demand for housing, and many previously outlying villages and forests became engulfed into the metropolitan area of Istanbul.[90]

Geography

 
Satellite view of Istanbul and the strait of Bosporus

Istanbul is located in north-western Turkey and straddles the Bosporus Strait, which provides the only passage from the Black Sea to the Mediterranean via the Sea of Marmara.[16] Historically, the city has been ideally situated for trade and defense: The confluence of the Sea of Marmara, the Bosporus, and the Golden Horn provide both ideal defense against enemy attack and a natural toll-gate.[16] Several picturesque islands—Büyükada, Heybeliada, Burgazada, Kınalıada, and five smaller islands—are part of the city.[16] Istanbul's shoreline has grown beyond its natural limits. Large sections of Caddebostan sit on areas of landfill, increasing the total area of the city to 5,343 square kilometers (2,063 sq mi).[16]

Despite the myth that seven hills make up the city, there are, in fact, more than 50 hills within the city limits. Istanbul's tallest hill, Aydos, is 537 meters (1,762 ft) high.[16]

The nearby North Anatolian Fault is responsible for much earthquake activity, although it does not physically pass through the city itself,[91] and a quake of at least magnitude 7 is more likely than not before 2030 and very likely in the 21st century.[92] The fault caused the earthquakes in 1766 and 1894.[91] The threat of major earthquakes plays a large role in the city's infrastructure development, with over 500,000 vulnerable buildings demolished and replaced since 2012.[91] The city has repeatedly upgraded its building codes, most recently in 2018,[93] requiring retrofits for older buildings[citation needed] and higher engineering standards for new construction.

Climate

 
Şile and Kilyos are two seaside resorts on the Black Sea, the body of water which tempers Istanbul's climate.

Istanbul's climate is temperate, and is often described as transitional between the Mediterranean climate typical of the western and southern coasts of Turkey, and the oceanic climate of the northwestern coasts of the country.[94] Much divergence exists in the terminology used to classify the city's climate, however.

The city's summers are warm to hot and moderately dry, with an average daytime temperature of about 27 °C (81 °F), and less than 7 days of precipitation per month. Despite the generally acceptable temperature range, however, mid-summer in Istanbul is considered moderately uncomfortable, due to high dew points and relative humidity.[95] Winters, meanwhile, are cool, quite rainy, and relatively snow-rich for a city with above-freezing average temperatures.

Istanbul's precipitation is unevenly distributed, with winter months getting at least twice the level of precipitation of their summerly counterparts. The mode of precipitation also varies by season. Winter precipitation is generally light, persistent and often of mixed precipitation such as rain-snow mixes and graupel; while summer precipitation is generally abrupt and sporadic. Cloudiness, as with precipitation, varies greatly by season. Winters are quite cloudy, with around 20 percent of days being sunny or partly cloudy. Meanwhile, summers experience 60-70 percent of possible sunshine.

Snowfall is sporadic, but accumulates every winter; and when it does, it is often persistent and disruptive. Sea-effect snowstorms with more than 30 centimetres (1 ft) of snowfall happen almost annually, most recently in 2022.[96][97]

Climate data for Kireçburnu, Istanbul (normals 1981–2010, snowy days 1996-2011, more data on the main article)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean daily maximum °C (°F) 8.5
(47.3)
8.7
(47.7)
10.9
(51.6)
15.5
(59.9)
20.1
(68.2)
25.0
(77.0)
26.9
(80.4)
27.2
(81.0)
23.8
(74.8)
19.2
(66.6)
14.2
(57.6)
10.4
(50.7)
17.5
(63.5)
Daily mean °C (°F) 5.8
(42.4)
5.5
(41.9)
7.3
(45.1)
11.2
(52.2)
15.7
(60.3)
20.5
(68.9)
22.9
(73.2)
23.4
(74.1)
19.9
(67.8)
15.8
(60.4)
11.0
(51.8)
7.8
(46.0)
13.9
(57.0)
Mean daily minimum °C (°F) 3.5
(38.3)
2.9
(37.2)
4.4
(39.9)
7.8
(46.0)
12.2
(54.0)
16.7
(62.1)
19.7
(67.5)
20.4
(68.7)
16.8
(62.2)
13.2
(55.8)
8.5
(47.3)
5.5
(41.9)
11.0
(51.8)
Average precipitation mm (inches) 99.5
(3.92)
82.1
(3.23)
69.2
(2.72)
43.1
(1.70)
31.5
(1.24)
40.6
(1.60)
39.6
(1.56)
41.9
(1.65)
64.4
(2.54)
102.3
(4.03)
110.3
(4.34)
125.1
(4.93)
849.6
(33.45)
Average precipitation days (≥ 0.1 mm) 16.9 15.2 13.2 10.0 7.4 7.0 4.7 5.1 8.1 12.3 13.9 17.5 131.3
Average snowy days (≥ 0.1 cm) 4.5 4.7 2.9 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.7 15.2
Mean monthly sunshine hours 68.2 89.6 142.6 180.0 248.0 297.6 319.3 288.3 234.0 158.1 93.0 62.0 2,180.7
Mean daily sunshine hours 2.2 3.2 4.6 6.0 8.0 9.6 10.3 9.3 7.8 5.1 3.1 2.0 5.9
Percent possible sunshine 22 29 38 46 57 64 69 66 65 46 31 22 46
Source: [98][99]

Climate change

 
Müze Gazhane in Kadıköy is the first climate change museum in Turkey.

As with virtually every part of the world, climate change is causing more heatwaves,[100] droughts,[101] storms,[102] and flooding[103][104] in Istanbul. Furthermore, as Istanbul is a large and rapidly expanding city, its urban heat island has been intensifying the effects of climate change.[105] If trends continue, sea level rise is likely to affect city infrastructure, for example Kadıkoy metro station is threatened with flooding.[106] Xeriscaping of green spaces has been suggested,[107] and Istanbul has a climate-change action plan,[108] but not a net zero target.[109]: 51 

Cityscape

Districts and neighborhoods

 
A view of Levent from Kanlıca across the Bosporus

European side

The Fatih district, which was named after Sultan Mehmed II (Turkish: Fatih Sultan Mehmed), corresponds to what was, until the Ottoman conquest in 1453, the whole of the city of Constantinople (today is the capital district and called the historic peninsula of Istanbul) on the southern shore of the Golden Horn, across the medieval Genoese citadel of Galata on the northern shore. The Genoese fortifications in Galata were largely demolished in the 19th century, leaving only the Galata Tower, to make way for the northward expansion of the city.[110] Galata (Karaköy) is today a quarter within the Beyoğlu (Pera) district, which forms Istanbul's commercial and entertainment center and includes İstiklal Avenue and Taksim Square.[111]

Dolmabahçe Palace, the seat of government during the late Ottoman period, is in the Beşiktaş district on the European shore of the Bosporus strait, to the north of Beyoğlu. The former village of Ortaköy is within Beşiktaş and gives its name to the Ortaköy Mosque on the Bosporus, near the Bosporus Bridge. Lining both the European and Asian shores of the Bosporus are the historic yalıs, luxurious chalet mansions built by Ottoman aristocrats and elites as summer homes.[112] Inland, north of Taksim Square is the Istanbul Central Business District, a set of corridors lined with office buildings, residential towers, shopping centers, and university campuses, and over 2,000,000 m2 (22,000,000 sq ft) of class-A office space in total. Maslak, Levent, and Bomonti are important nodes within the CBD.[113][114]

The Atatürk Airport corridor is another such edge city-style business, residential and shopping corridor with over 900,000 m2 (9,700,000 sq ft) of class-A office space.[114]

 
Originally outside the city, yalı residences along the Bosporus are now homes in some of Istanbul's elite neighborhoods.

Asian side

During the Ottoman period, Üsküdar (then Scutari) and Kadıköy were outside the scope of the urban area, serving as tranquil outposts with seaside yalıs and gardens. But in the second half of the 20th century, the Asian side experienced major urban growth; the late development of this part of the city led to better infrastructure and tidier urban planning when compared with most other residential areas in the city.[115] Much of the Asian side of the Bosporus functions as a suburb of the economic and commercial centers in European Istanbul, accounting for a third of the city's population but only a quarter of its employment.[115] However, KozyatağıAtaşehir, Altunizade, Kavacık and Ümraniye, all together having around 1.4 million sqm of class-A office space) are now important "edge cities", i.e. corridors and nodes of business and shopping centers and of tall residential buildings.[114]

Expansion

As a result of Istanbul's exponential growth in the 20th century, a significant portion of the city is composed of gecekondus (literally "built overnight"), referring to illegally constructed squatter buildings.[116] At present, some gecekondu areas are being gradually demolished and replaced by modern mass-housing compounds.[117] Moreover, large scale gentrification and urban renewal projects have been taking place,[118] such as the one in Tarlabaşı;[119] some of these projects, like the one in Sulukule, have faced criticism.[120] The Turkish government also has ambitious plans for an expansion of the city west and northwards on the European side in conjunction with the new Istanbul Airport, opened in 2019; the new parts of the city will include four different settlements with specified urban functions, housing 1.5 million people.[121]

Parks

 
A view of Taksim Square with the Republic Monument (1928) designed by Italian sculptor Pietro Canonica and Taksim Mosque

Istanbul does not have a primary urban park, but it has several green areas. Gülhane Park and Yıldız Park were originally included within the grounds of two of Istanbul's palaces — Topkapı Palace and Yıldız Palace—but they were repurposed as public parks in the early decades of the Turkish Republic.[122] Another park, Fethi Paşa Korusu, is on a hillside adjacent to the Bosphorus Bridge in Anatolia, opposite Yıldız Palace in Europe. Along the European side, and close to the Fatih Sultan Mehmet Bridge, is Emirgan Park, which was known as the Kyparades (Cypress Forest) during the Byzantine period. In the Ottoman period, it was first granted to Nişancı Feridun Ahmed Bey in the 16th century, before being granted by Sultan Murad IV to the Safavid Emir Gûne Han in the 17th century, hence the name Emirgan. The 47-hectare (120-acre) park was later owned by Khedive Ismail Pasha of Ottoman Egypt and Sudan in the 19th century. Emirgan Park is known for its diversity of plants and an annual tulip festival is held there since 2005.[123] The AKP government's decision to replace Taksim Gezi Park with a replica of the Ottoman era Taksim Military Barracks (which was transformed into the Taksim Stadium in 1921, before being demolished in 1940 for building Gezi Park) sparked a series of nationwide protests in 2013 covering a wide range of issues. Popular during the summer among Istanbulites is Belgrad Forest, spreading across 5,500 hectares (14,000 acres) at the northern edge of the city. The forest originally supplied water to the city and remnants of reservoirs used during Byzantine and Ottoman times survive.[124][125]

 
Panoramic view of Istanbul from the confluence of the Bosporus and the Sea of Marmara. Several landmarks—including Sultan Ahmed Mosque, the Hagia Sophia, Topkapı Palace, and Dolmabahçe Palace—can be seen along their shores.

Architecture

 
Galata Tower dominates the skyline of the medieval Genoese citadel at the north of the Golden Horn.

Istanbul is primarily known for its Byzantine and Ottoman architecture. Despite its development as a Turkish city since 1923, it contains many ancient, Roman, Byzantine, Christian, Muslim, and Jewish monuments.

The Neolithic settlement in the Yenikapı quarter on the European side, which dates back to c. 6500 BCE and predates the formation of the Bosporus strait by approximately a millennium (when the Sea of Marmara was still a lake)[126] was discovered during the construction of the Marmaray railway tunnel.[27] It is the oldest known human settlement on the European side of the city.[27] The oldest known human settlement on the Asian side is the Fikirtepe Mound near Kadıköy, with relics dating to c. 5500-3500 BCE (Chalcolithic period).

There are numerous ancient monuments in the city.[127] The most ancient is the Obelisk of Thutmose III (Obelisk of Theodosius).[127] Built of red granite, 31 m (100 ft) high, it came from the Temple of Karnak in Luxor, and was erected there by Pharaoh Thutmose III (r. 1479–1425 BCE) to the south of the seventh pylon.[127] The Roman emperor Constantius II (r. 337–361 CE) had it and another obelisk transported along the River Nile to Alexandria for commemorating his ventennalia or 20 years on the throne in 357. The other obelisk was erected on the spina of the Circus Maximus in Rome in the autumn of that year, and is now known as the Lateran Obelisk. The obelisk that would become the Obelisk of Theodosius remained in Alexandria until 390 CE, when Theodosius I (r. 379–395 CE) had it transported to Constantinople and put up on the spina of the Hippodrome there.[128] When re-erected at the Hippodrome of Constantinople, the obelisk was mounted on a decorative base, with reliefs that depict Theodosius I and his courtiers.[127] The lower part of the obelisk was damaged in antiquity, probably during its transport to Alexandria in 357 CE or during its re-erection at the Hippodrome of Constantinople in 390 CE. As a result, the current height of the obelisk is only 18.54 meters, or 25.6 meters if the base is included. Between the four corners of the obelisk and the pedestal are four bronze cubes, used in its transportation and re-erection.[129]

 
 
 
 
Built by Ottoman sultans Abdülmecid and Abdülaziz, the 19th-century Dolmabahçe, Çırağan, Beylerbeyi and Küçüksu palaces on the Bosporus were designed by members of the Armenian Balyan family of court architects.[130]

Next in age is the Serpent Column, from 479 BCE.[127] It was brought from Delphi in 324 CE, during the reign of Constantine the Great, and also erected at the spina of the Hippodrome.[127] It was originally part of an ancient Greek sacrificial tripod in Delphi that was erected to commemorate the Greeks who fought and defeated the Persian Empire at the Battle of Plataea (479 BCE). The three serpent heads of the 8-meter (26 ft) high column remained intact until the end of the 17th century (one is on display at the nearby Istanbul Archaeology Museums).[131]

Built in porphyry and erected at the center of the Forum of Constantine in 330 CE to mark the founding of the new Roman capital, the Column of Constantine was originally adorned with a sculpture of the Roman emperor Constantine the Great depicted as the solar god Apollo on its top, which fell in 1106 and was later replaced by a cross during the reign of Byzantine emperor Manuel Komnenos (r. 1143–1180).[18][127]

There are traces of the Byzantine era throughout the city, from ancient churches that were built over early Christian meeting places like the Hagia Irene, the Chora Church, the Monastery of Stoudios, the Church of Sts. Sergius and Bacchus, the Church of Theotokos Pammakaristos, the Monastery of the Pantocrator, the Monastery of Christ Pantepoptes, the Hagia Theodosia, the Church of Theotokos Kyriotissa, the Monastery of Constantine Lips, the Church of Myrelaion, the Hagios Theodoros, etc.; to palaces like the Great Palace of Constantinople and its Mosaic Museum, the Palace of the Porphyrogenitus, Boukoleon Palace and Palace of Blachernae; and other public places and buildings like the Hippodrome, the Augustaion, the Basilica Cistern, Theodosius Cistern, Cistern of Philoxenos and Cistern of the Hebdomon, the Aqueduct of Valens, the Prison of Anemas, the Walls of Constantinople and the Porta Aurea (Golden Gate), among numerous others. The 4th century Harbor of Theodosius in Yenikapı, once the busiest port in Constantinople, was among the numerous archeological discoveries that took place during the excavations of the Marmaray tunnel.[27]

However, it is the Hagia Sophia that fully conveys the period of Constantinople as a city without parallel in Christendom. The Hagia Sophia, topped by a dome 31 meters (102 ft) in diameter over a square space defined by four arches, is the pinnacle of Byzantine architecture.[132] The Hagia Sophia stood as the world's largest cathedral in the world until it was converted into a mosque in the 15th century.[132] The minarets date from that period.[132] Because of its historical significance, it was reopened as a museum in 1935. However, it was re-converted into a mosque in July 2020.

 
Sultan Ahmed Mosque is known as the Blue Mosque due to the blue İznik tiles which adorn its interior.[133] The Obelisk of Thutmose III (Obelisk of Theodosius) is seen in the foreground.

Over the next four centuries, the Ottomans transformed Istanbul's urban landscape with a vast building scheme that included the construction of towering mosques and ornate palaces. The Sultan Ahmed Mosque (Blue Mosque), another landmark of the city, faces the Hagia Sophia at Sultanahmet Square (Hippodrome of Constantinople). The Süleymaniye Mosque, built by Suleiman the Magnificent, was designed by his chief architect Mimar Sinan, the most illustrious of all Ottoman architects, who designed many of the city's renowned mosques and other types of public buildings and monuments.[134]

Among the oldest surviving examples of Ottoman architecture in Istanbul are the Anadoluhisarı and Rumelihisarı fortresses, which assisted the Ottomans during their siege of the city.[135] Over the next four centuries, the Ottomans made an indelible impression on the skyline of Istanbul, building towering mosques and ornate palaces.

 
A view of Topkapı Palace, the inner core of which was built in 1459–1465, from across the Golden Horn, with the Prince Islands in the background

Topkapı Palace, dating back to 1465, is the oldest seat of government surviving in Istanbul. Mehmed II built the original palace as his main residence and the seat of government.[136] The present palace grew over the centuries as a series of additions enfolding four courtyards and blending neoclassical, rococo, and baroque architectural forms.[137] In 1639, Murad IV made some of the most lavish additions, including the Baghdad Kiosk, to commemorate his conquest of Baghdad the previous year.[138] Government meetings took place here until 1786, when the seat of government was moved to the Sublime Porte.[136] After several hundred years of royal residence, it was abandoned in 1853 in favor of the baroque Dolmabahçe Palace.[137] Topkapı Palace became public property following the abolition of monarchy in 1922.[137] After extensive renovation, it became one of Turkey's first national museums in 1924.[136]

The imperial mosques include Fatih Mosque, Bayezid Mosque, Yavuz Selim Mosque, Süleymaniye Mosque, Sultan Ahmed Mosque (the Blue Mosque), and Yeni Mosque, all of which were built at the peak of the Ottoman Empire, in the 16th and 17th centuries. In the following centuries, and especially after the Tanzimat reforms, Ottoman architecture was supplanted by European styles.[139] An example of which is the imperial Nuruosmaniye Mosque. Areas around İstiklal Avenue were filled with grand European embassies and rows of buildings in Neoclassical, Renaissance Revival and Art Nouveau styles, which went on to influence the architecture of a variety of structures in Beyoğlu—including churches, stores, and theaters—and official buildings such as Dolmabahçe Palace.[140]

Administration

 
Istanbul's districts extend far from the city center, along the full length of the Bosporus (with the Black Sea at the top and the Sea of Marmara at the bottom of the map).

Since 2004, the municipal boundaries of Istanbul have been coincident with the boundaries of its province.[141] The city, considered capital of the larger Istanbul Province, is administered by the Istanbul Metropolitan Municipality (IMM, Turkish: İstanbul Büyükşehir Belediyesi, IBB), which oversees the 39 districts of the city-province.

The current city structure can be traced back to the Tanzimat period of reform in the 19th century, before which Islamic judges and imams led the city under the auspices of the Grand Vizier. Following the model of French cities, this religious system was replaced by a mayor and a citywide council composed of representatives of the confessional groups (millet) across the city. Pera (now Beyoğlu) was the first area of the city to have its own director and council, with members instead being longtime residents of the neighborhood.[142] Laws enacted after the Ottoman constitution of 1876 aimed to expand this structure across the city, imitating the twenty arrondissements of Paris, but they were not fully implemented until 1908 when the city was declared a province with nine constituent districts.[143][144] This system continued beyond the founding of the Turkish Republic, with the province renamed a belediye (municipality), but the municipality was disbanded in 1957.[145]

 
Statue of Atatürk in Büyükada, the largest of the Prince Islands to the southeast of Istanbul, which collectively form the Adalar (Isles) district of Istanbul Province

Small settlements adjacent to major population centers in Turkey, including Istanbul, were merged into their respective primary cities during the early 1980s, resulting in metropolitan municipalities.[146][147] The main decision-making body of the Istanbul Metropolitan Municipality is the Municipal Council, with members drawn from district councils.

The Municipal Council of Istanbul is responsible for citywide issues, including managing the budget, maintaining civic infrastructure, and overseeing museums and major cultural centers.[148] Since the government operates under a "powerful mayor, weak council" approach, the council's leader—the metropolitan mayor—has the authority to make swift decisions, often at the expense of transparency.[149] The Municipal Council is advised by the Metropolitan Executive Committee, although the committee also has limited power to make decisions of its own.[150] All representatives on the committee are appointed by the metropolitan mayor and the council, with the mayor—or someone of his or her choosing—serving as head.[150][151]

District councils are chiefly responsible for waste management and construction projects within their respective districts. They each maintain their own budgets, although the metropolitan mayor reserves the right to review district decisions. One-fifth of all district council members, including the district mayors, also represent their districts in the Municipal Council.[148] All members of the district councils and the Municipal Council, including the metropolitan mayor, are elected to five-year terms.[152] Representing the Republican People's Party, Ekrem İmamoğlu has been the Mayor of Istanbul since 27 June 2019.[153]

With the Istanbul Metropolitan Municipality and Istanbul Province having equivalent jurisdictions, few responsibilities remain for the provincial government. Like the MMI, the Istanbul Special Provincial Administration has a governor, a democratically elected decision-making body—the Provincial Parliament—and an appointed Executive Committee. Mirroring the executive committee at the municipal level, the Provincial Executive Committee includes a secretary-general and leaders of departments that advise the Provincial Parliament.[151][154] The Provincial Administration's duties are largely limited to the building and maintenance of schools, residences, government buildings, and roads, and the promotion of arts, culture, and nature conservation.[155] Ali Yerlikaya has been the Governor of Istanbul Province since 26 October 2018.[156]

Demographics

 
Istanbul population pyramid in 2022
Historical populations
Pre-Republic
YearPop.
10036,000
361300,000
500400,000
7th c.150–350,000
8th c.125–500,000
9th c.50–250,000
1000150–300,000
1100200,000
1200150,000
1261100,000
135080,000
145345,000
1500200,000
1550660,000
1700700,000
1815500,000
1860715,000
1890874,000
1900942,900
Republic
YearPop.±% p.a.
1925881,000—    
1927691,000−11.44%
1935740,800+0.87%
1940793,900+1.39%
1945845,300+1.26%
1950983,000+3.06%
19601,459,500+4.03%
19651,743,000+3.61%
19702,132,400+4.12%
19752,547,400+3.62%
19802,853,500+2.30%
19855,494,900+14.00%
19906,620,200+3.80%
19947,615,500+3.56%
19978,260,400+2.75%
20008,831,800+2.25%
200711,174,200+3.42%
201514,657,434+3.45%
201614,804,116+1.00%
201715,029,231+1.52%
201815,067,724+0.26%
201915,519,267+3.00%
Sources: Jan Lahmeyer 2004,Chandler 1987, Morris 2010,Turan 2010[157]
Pre-Republic figures estimated[e]

Throughout most of its history, Istanbul has ranked among the largest cities in the world. By 500 CE, Constantinople had somewhere between 400,000 and 500,000 people, edging out its predecessor, Rome, for the world's largest city.[159] Constantinople jostled with other major historical cities, such as Baghdad, Chang'an, Kaifeng and Merv for the position of the world's largest city until the 12th century. It never returned to being the world's largest, but remained the largest city in Europe from 1500 to 1750, when it was surpassed by London.[160]

The Turkish Statistical Institute estimates that the population of Istanbul Metropolitan Municipality was 15,519,267 at the end of 2019, hosting 19 percent of the country's population.[161] 64.4% of the residents live on the European side and 35.6% on the Asian side.[161]

Istanbul ranks as the seventh-largest city proper in the world, and the second-largest urban agglomeration in Europe, after Moscow.[162][163] The city's annual population growth of 1.5 percent ranks as one of the highest among the seventy-eight largest metropolises in the Organisation for Economic Co-operation and Development. The high population growth mirrors an urbanization trend across the country, as the second and third fastest-growing OECD metropolises are the Turkish cities of Izmir and Ankara.[17]

Istanbul experienced especially rapid growth during the second half of the 20th century, with its population increasing tenfold between 1950 and 2000.[164] This growth was fueled by internal and international migration. Istanbul's foreign population with a residence permit increased dramatically, from 43,000 in 2007[165] to 856,377 in 2019.[166][167]

According to 2020 TÜİK data around 2.1 million people in a population of over 15.4 million have been registered[g] in Istanbul, meanwhile the vast majority of the residents ultimately originate from Anatolian provinces, especially those in the Black Sea, Central and Eastern Anatolia regions due to internal migration since the 1950s.[168] People registered in Kastamonu, Ordu, Giresun, Erzurum, Samsun, Malatya, Trabzon, Sinop and Rize provinces represent the biggest population groups in Istanbul, meanwhile people registered in Sivas has the highest percentage with more than 760 thousand residents in the city.[169] A 2019 survey found that only 36% of the Istanbul's population was born in the province.[170]

Ethnic and religious groups

Ethnic groups among Turkish citizens in Istanbul (2019 KONDA survey)
Turks
78%
Kurds
17%
Zazas
1%
Arabs
1%
Others
3%

Istanbul has been a cosmopolitan city throughout much of its history, but it has become more homogenized since the end of the Ottoman era. The dominant ethnic group in the city is Turkish people, which also forms the majority group in Turkey. According to survey data 78% of the voting-age Turkish citizens in Istanbul state "Turkish" as their ethnic identity.[170]

With estimates ranging from 2 to 4 million, Kurds form one of the largest ethnic minorities in Istanbul and are the biggest group after Turks among Turkish citizens.[171][172] According to a 2019 KONDA study, Kurds constituted around 17% of Istanbul's adult total population who were Turkish citizens.[170] Although the initial Kurdish presence in the city dates back to the early Ottoman period,[173] the majority of Kurds in the city originate from villages in eastern and southeastern Turkey.[174] Zazas are also present in the city and constitute around 1% of the total voting-age population.[170]

Arabs form the city's other largest ethnic minority, with an estimated population of more than 2 million.[175] Following Turkey's support for the Arab Spring, Istanbul emerged as a hub for dissidents from across the Arab world, including former presidential candidates from Egypt, Kuwaiti MPs, and former ministers from Jordan, Saudi Arabia (including Jamal Khashoggi), Syria, and Yemen.[176][177][178] As of August 2019, the number of refugees of the Syrian Civil War in Turkey residing in Istanbul was estimated to be around 1 million.[179] Native Arab population in Turkey who are Turkish citizens are found to be making up less than 1% of city's total adult population.[170] As of August 2023, there were more than 530,000 refugees of the Syrian civil war in Istanbul, the highest number in any Turkish city.[180]

 
Built by Suleiman the Magnificent, the Süleymaniye Mosque (1550–1557) was designed by his chief architect Mimar Sinan, the most illustrious of all Ottoman architects.[134]

2019 survey study by KONDA that examined the religiosity of the voting-age adults in Istanbul showed that 57% of the surveyed had a religion and were trying to practise its requirements. This was followed by nonobservant people with 26% who identified with a religion but generally did not practise its requirements. 11% stated they were fully devoted to their religion, meanwhile 6% were non-believers who did not believe the rules and requirements of a religion. 24% of the surveyed also identified themselves as "religious conservatives". Around 90% of Istanbul's population are Sunni Muslims and Alevism forms the second biggest religious group.[170][181]

Into the 19th century, the Christians of Istanbul tended to be either Greek Orthodox, members of the Armenian Apostolic Church or Catholic Levantines.[182] Greeks and Armenians form the largest Christian population in the city. While Istanbul's Greek population was exempted from the 1923 population exchange with Greece, changes in tax status and the 1955 anti-Greek pogrom prompted thousands to leave.[183] Following Greek migration to the city for work in the 2010s, the Greek population rose to nearly 3,000 in 2019, still greatly diminished since 1919, when it stood at 350,000.[183] There are today 50,000 to 70,000 Armenians in Istanbul[184] down from a peak of 164,000 in 1913.[185] As of 2019, an estimated 18,000 of the country's 25,000 Christian Assyrians live in Istanbul.[186]

 
There are 234 active churches and chapels in the city,[187] including the Church of St. Anthony of Padua on İstiklal Avenue in Beyoğlu (Pera).

The majority of the Catholic Levantines (Turkish: Levanten) in Istanbul and Izmir are the descendants of traders/colonists from the Italian maritime republics of the Mediterranean (especially Genoa and Venice) and France, who obtained special rights and privileges called the Capitulations from the Ottoman sultans in the 16th century.[188] The community had more than 15,000 members during Atatürk's presidency in the 1920s and 1930s, but today is reduced to only a few hundreds, according to Italo-Levantine writer Giovanni Scognamillo.[189] They continue to live in Istanbul (mostly in Karaköy, Beyoğlu and Nişantaşı), and Izmir (mostly in Karşıyaka, Bornova and Buca).

Istanbul became one of the world's most important Jewish centers in the 16th and 17th century.[190] Romaniote and Ashkenazi communities existed in Istanbul before the conquest of Istanbul, but it was the arrival of Sephardic Jews that ushered a period of cultural flourishing. Sephardic Jews settled in the city after their expulsion from Spain and Portugal in 1492 and 1497.[190] Sympathetic to the plight of Sephardic Jews, Bayezid II sent out the Ottoman Navy under the command of admiral Kemal Reis to Spain in 1492 in order to evacuate them safely to Ottoman lands.[190] In marked contrast to Jews in Europe, Ottoman Jews were allowed to work in any profession.[191] Ottoman Jews in Istanbul excelled in commerce and came to particularly dominate the medical profession.[191] By 1711, using the printing press, books came to be published in Spanish and Ladino, Yiddish, and Hebrew.[192] In large part due to emigration to Israel, the Jewish population in the city dropped from 100,000 in 1950[193] to 15,000 in 2021.[194][195][196]

Politics

Politically, Istanbul is seen as the most important administrative region in Turkey. In the run-up to local elections in 2019, Erdoğan claimed 'if we fail in Istanbul, we will fail in Turkey'.[197] The contest in Istanbul carried deep political, economic and symbolic significance for Erdoğan, whose election of mayor of Istanbul in 1994 had served as his launchpad.[198] For Ekrem İmamoğlu, winning the mayoralty of Istanbul was a huge moral victory, but for Erdoğan it had practical ramifications: His party, AKP, lost control of the $4.8 billion municipal budget, which had sustained patronage at the point of delivery of many public services for 25 years.[199]

 
Ekrem İmamoğlu of the CHP is the 32nd and current Mayor of Istanbul, elected in 2019.

More recently, Istanbul and many of Turkey's metropolitan cities are following a trend away from the government and their right-wing ideology. In 2013 and 2014, large-scale anti-AKP government protests began in İstanbul and spread throughout the nation. This trend first became evident electorally in the 2014 mayoral election where the center-left opposition candidate won an impressive 40% of the vote, despite not winning. The first government defeat in Istanbul occurred in the 2017 constitutional referendum, where Istanbul voted 'No' by 51.4% to 48.6%. The AKP government had supported a 'Yes' vote and won the vote nationally due to high support in rural parts of the country. The biggest defeat for the government came in the 2019 local elections, where their candidate for Mayor, former Prime Minister Binali Yıldırım, was defeated by a very narrow margin by the opposition candidate Ekrem İmamoğlu. İmamoğlu won the vote with 48.77% of the vote, against Yıldırım's 48.61%, but the elections were controversially annulled by the Supreme Electoral Council due to AKP's claim of electoral fraud. In the re-run İmamoğlu gathered 54.22% of the total vote and widened the defeat margin.[200]

Administratively, Istanbul is divided into 39 districts, more than any other province in Turkey. Istanbul Province sends 98 Members of Parliament to the Grand National Assembly of Turkey, which has a total of 600 seats. For the purpose of parliamentary elections, Istanbul is divided into three electoral districts; two on the European side and one on the Asian side, electing 28, 35 and 35 MPs respectively.[citation needed]

Economy

 
Istanbul has always been the "financial capital" of Turkey, even after Ankara became the new political capital in 1923.

Istanbul had the eleventh-largest economy among the world's urban areas in 2018, and is responsible for 30 percent of Turkey's industrial output,[201] 31 percent of GDP,[201] and 47 percent of tax revenues.[201] The city's gross domestic product adjusted by PPP stood at US$537.507 billion in 2018,[202] with manufacturing and services accounting for 36 percent and 60 percent of the economic output respectively.[201] Istanbul's productivity is 110 percent higher than the national average.[201] Trade is economically important, accounting for 30 percent of the economic output in the city.[16] In 2019, companies based in Istanbul produced exports worth $83.66 billion and received imports totaling $128.34 billion; these figures were equivalent to 47 percent and 61 percent, respectively, of the national totals.[203]

Istanbul, which straddles the Bosporus strait, houses international ports that link Europe and Asia. The Bosporus, providing the only passage from the Black Sea to the Mediterranean, is the world's busiest and narrowest strait used for international navigation, with more than 200 million tons of oil passing through it each year.[204] International conventions guarantee passage between the Black and the Mediterranean seas,[205] even when tankers carry oil, LNG/LPG, chemicals, and other flammable or explosive materials as cargo. In 2011, as a workaround solution, the then Prime Minister Erdoğan presented Canal Istanbul, a project to open a new strait between the Black and Marmara seas.[205] While the project was still on Turkey's agenda in 2020, there has not been a clear date set for it.[16]

 
Deutsche Orientbank AG (1909) in Sirkeci

Shipping is a significant part of the city's economy, with 73.9 percent of exports and 92.7 percent of imports in 2018 executed by sea.[16] Istanbul has three major shipping ports – the Port of Haydarpaşa, the Port of Ambarlı, and the Port of Zeytinburnu – as well as several smaller ports and oil terminals along the Bosporus and the Sea of Marmara.[16]

Haydarpaşa, at the southeastern end of the Bosporus, was Istanbul's largest port until the early 2000s.[206] Since then operations were shifted to Ambarlı, with plans to convert Haydarpaşa into a tourism complex.[16] In 2019, Ambarlı, on the western edge of the urban center, had an annual capacity of 3,104,882 TEUs, making it the third-largest cargo terminal in the Mediterranean basin.[206]

Istanbul has been an international banking hub since the 1980s,[16] and is home to the only active stock exchange in Turkey, Borsa Istanbul, which was originally established as the Ottoman Stock Exchange in 1866.[207]

 
Ottoman Central Bank Head Office (1892) on Bankalar Caddesi

In 1995, keeping up with the financial trends, Borsa Istanbul moved its headquarters (which was originally located on Bankalar Caddesi, the financial center of the Ottoman Empire,[207] and later at the 4th Vakıf Han building in Sirkeci) to İstinye, in the vicinity of Maslak, which hosts the headquarters of numerous Turkish banks.[208]

Since 2023, the Ataşehir district on the Asian side of the city is home to the Istanbul Financial Center (IFC), where the new headquarters of the state-owned Turkish banks, including the Turkish Central Bank, are located.[209][210] As of 2023, the five tallest skyscrapers in Istanbul and Turkey are the 352 m (1,154 ft 10 in) tall Turkish Central Bank Tower[211][212][213][214][215][216] in the Ataşehir district on the Asian side of the city; Metropol Istanbul Tower A (70 floors / 301 metres including its twin spires)[217][218][219][220] also in the Ataşehir district; Skyland Istanbul Towers 1 and 2 (2 x 284 metres)[221][222] located adjacent to Nef Stadium in the Huzur neighbourhood of the Sarıyer district, on the European side; and Istanbul Sapphire (54 floors / 238 metres; 261 metres including its spire)[223] in Levent, on the European side of the city.

13.4 million foreign tourists visited the city in 2018, making Istanbul the world's fifth most-visited city in that year.[224] Istanbul and Antalya are Turkey's two largest international gateways, receiving a quarter of the nation's foreign tourists. Istanbul has more than fifty museums, with the Topkapı Palace, the most visited museum in the city, bringing in more than $30 million in revenue each year.[16]

Istanbul expects 1 million tourists from cruise companies after the renovation of its cruise port, also known as Galataport in Karaköy district.[225]

 
A view of Dolmabahçe Palace and the skyscrapers of Levent financial district in the background.[226][227] Providing the only sea route to the Black Sea, the Bosporus is the world's busiest waterway that is used for international navigation.[16]

Culture

 
Yalı houses on the Bosporus are among the frequently used settings in Turkish television dramas (dizi).

Istanbul was historically known as a cultural hub, but its cultural scene stagnated after the Turkish Republic shifted its focus toward Ankara.[228] The new national government established programs that served to orient Turks toward musical traditions, especially those originating in Europe, but musical institutions and visits by foreign classical artists were primarily centered in the new capital.[229]

Much of Turkey's cultural scene had its roots in Istanbul, and by the 1980s and 1990s Istanbul reemerged globally as a city whose cultural significance is not solely based on its past glory.[230]

By the end of the 19th century, Istanbul had established itself as a regional artistic center, with Turkish, European, and Middle Eastern artists flocking to the city. Despite efforts to make Ankara Turkey's cultural heart, Istanbul had the country's primary institution of art until the 1970s.[231] When additional universities and art journals were founded in Istanbul during the 1980s, artists formerly based in Ankara moved in.[232]

 
The Istanbul Archaeology Museums, founded by Osman Hamdi Bey in 1891, form Turkey's oldest modern museum.[233]

Beyoğlu has been transformed into the artistic center of the city, with young artists and older Turkish artists formerly residing abroad finding footing there. Modern art museums, including İstanbul State Art and Sculpture Museum, National Palaces Painting Museum, İstanbul Modern, the Pera Museum, Sakıp Sabancı Museum, Arter and SantralIstanbul, opened in the 2000s to complement the exhibition spaces and auction houses that have already contributed to the cosmopolitan nature of the city.[234] These museums have yet to attain the popularity of older museums on the historic peninsula, including the Istanbul Archaeology Museums, which ushered in the era of modern museums in Turkey, and the Turkish and Islamic Arts Museum.[233]

 
The restored Paket Postanesi (Parcel Post Office) building is now a symbol of Galataport. The district is also home to Museums Square.

The first film screening in Turkey was at Yıldız Palace in 1896, a year after the technology publicly debuted in Paris.[235] Movie theaters rapidly cropped up in Beyoğlu, with the greatest concentration of theaters being along the street now known as İstiklal Avenue.[236] Istanbul also became the heart of Turkey's nascent film industry, although Turkish films were not consistently developed until the 1950s.[237] Since then, Istanbul has been the most popular location to film Turkish dramas and comedies.[238] The Turkish film industry ramped up in the second half of the century, and with Uzak (2002) and My Father and My Son (2005), both filmed in Istanbul, the nation's movies began to see substantial international success.[239] Istanbul and its picturesque skyline have also served as a backdrop for several foreign films, including From Russia with Love (1963), Topkapi (1964), The World Is Not Enough (1999), and Mission Istaanbul (2008).[240]

Coinciding with this cultural reemergence was the establishment of the Istanbul Festival, which began showcasing a variety of art from Turkey and around the world in 1973. From this flagship festival came the International Istanbul Film Festival and the Istanbul Jazz Festival in the early 1980s. With its focus now solely on music and dance, the Istanbul Festival has been known as the Istanbul International Music Festival since 1994.[241] The most prominent of the festivals that evolved from the original Istanbul Festival is the Istanbul Biennial, held every two years since 1987. Its early incarnations were aimed at showcasing Turkish visual art, and it has since opened to international artists and risen in prestige to join the elite biennales, alongside the Venice Biennale and the São Paulo Art Biennial.[242]

Leisure and entertainment

 
İstiklal Avenue in Beyoğlu

Abdi İpekçi Street in Nişantaşı, Galataport Shopping Area in Karaköy and Bağdat Avenue on the Anatolian side of the city have evolved into high-end shopping districts.[243][244] Other focal points for shopping, leisure and entertainment include Nişantaşı, Ortaköy, Bebek and Kadıköy.[245] The city has numerous shopping centers, from the historic to the modern. Istanbul also has an active nightlife and historic taverns, a signature characteristic of the city for centuries, if not millennia.

The Grand Bazaar, in operation since 1461, is among the world's oldest and largest covered markets.[246][247] Mahmutpasha Bazaar is an open-air market extending between the Grand Bazaar and the Spice Bazaar, which has been Istanbul's major spice market since 1660.

Galleria Ataköy ushered in the age of modern shopping malls in Turkey when it opened in 1987.[248] Since then, malls have become major shopping centers outside the historic peninsula. Akmerkez was awarded the titles of "Europe's best" and "World's best" shopping mall by the International Council of Shopping Centers in 1995 and 1996; Istanbul Cevahir has been one of the continent's largest since opening in 2005; and Kanyon won the Cityscape Architectural Review Award in the Commercial Built category in 2006.[247] Zorlu Center and İstinye Park are among the other upscale malls in Istanbul which include the stores of the world's top fashion brands.

 
Süreyya Opera House is situated on the Asian side of Istanbul and Atatürk Cultural Center is the main opera house on the European side.

Along İstiklal Avenue is the Çiçek Pasajı (Flower Passage), a 19th-century shopping gallery which is today home to winehouses (known as meyhanes), pubs and restaurants.[249] İstiklal Avenue, originally known for its taverns, has shifted toward shopping, but the nearby Nevizade Street is still lined with winehouses and pubs.[250][251] Some other neighborhoods around İstiklal Avenue have been revamped to cater to Beyoğlu's nightlife, with formerly commercial streets now lined with pubs, cafes, and restaurants playing live music.[252]

 
Zorlu Center, designed by EAA and Tabanlıoğlu Architects, includes Zorlu PSM, the city's largest performing arts theatre and concert hall.

Istanbul is known for its historic seafood restaurants. Many of the city's most popular and upscale seafood restaurants line the shores of the Bosporus (particularly in neighborhoods like Ortaköy, Bebek, Arnavutköy, Yeniköy, Beylerbeyi and Çengelköy). Kumkapı along the Sea of Marmara has a pedestrian zone that hosts around fifty fish restaurants.[253]

The Princes' Islands, 15 kilometers (9 mi) from the city center, are also popular for their seafood restaurants. Because of their restaurants, historic summer mansions, and tranquil, car-free streets, the Prince Islands are a popular vacation destination among Istanbulites and foreign tourists.[254]

Istanbul is also famous for its sophisticated and elaborately-cooked dishes of the Ottoman cuisine. Following the influx of immigrants from southeastern and eastern Turkey, which began in the 1960s, the city's foodscape has drastically changed by the end of the century; with influences of Middle Eastern cuisine such as kebab taking an important place in the food scene.

Restaurants featuring foreign cuisines are mainly concentrated in the Beyoğlu, Beşiktaş, Şişli and Kadıköy districts.

Apart from the city's numerous stadiums, sports halls and concert halls, there are several open-air venues for concerts and festivals, such as the Cemil Topuzlu Open-Air Theatre in Harbiye, Paraf Kuruçeşme Open-Air on the Bosphorus shore in Kuruçeşme, and Parkorman in the forest of Maslak. The annual Istanbul Jazz Festival has been held every year since 1994. Organized between 2003 and 2013, Rock'n Coke was the biggest open-air rock festival in Turkey, sponsored by Coca-Cola. It was traditionally held at the Hezarfen Airfield in Istanbul.

 
Abdi İpekçi Street in Nişantaşı, one of Istanbul's premier shopping streets

The Istanbul International Music Festival has been held annually since 1973, and the International Istanbul Film Festival has been held annually since 1982. The Istanbul Biennial is a contemporary art exhibition that has been held biennially since 1987. The Istanbul Shopping Fest is an annual shopping festival held since 2011, and Teknofest is an annual festival of aviation, aerospace and technology, held since 2018.

When it was held for the first time in 2003, the annual Istanbul Pride became the first gay pride event in a Muslim-majority country.[255] Since 2015, all types of parades at Taksim Square and İstiklal Avenue (where, in 2013, the Gezi Park protests took place) have been denied permission by the AKP government, citing security concerns, but hundreds of people have defied the ban each year. Critics have claimed that the bans were in fact due to ideological reasons.

Sports

Istanbul is home to some of Turkey's oldest sports clubs. Beşiktaş JK, established in 1903, is considered the oldest of these sports clubs. Due to its initial status as Turkey's only club, Beşiktaş occasionally represented the Ottoman Empire and Turkish Republic in international sports competitions, earning the right to place the Turkish flag inside its team logo.[256] Galatasaray SK and Fenerbahçe SK have fared better in international competitions and have won more Süper Lig titles, at 22 and 19 times, respectively.[257][258][259] Galatasaray and Fenerbahçe have a long-standing rivalry, with Galatasaray based in the European part and Fenerbahçe based in the Anatolian part of the city.[258] Istanbul has seven basketball teams—Anadolu Efes, Beşiktaş, Darüşşafaka, Fenerbahçe, Galatasaray, İstanbul Büyükşehir Belediyespor and Büyükçekmece—that play in the premier-level Turkish Basketball Super League.[260]

Many of Istanbul's sports facilities have been built or upgraded since 2000 to bolster the city's bids for the Summer Olympic Games. Atatürk Olympic Stadium, the largest multi-purpose stadium in Turkey, was completed in 2002 as an IAAF first-class venue for track and field.[261] The stadium hosted the 2005 UEFA Champions League Final, and was selected by the UEFA to host the CL Final games of 2020 and 2021, which were relocated to Lisbon (2020) and Porto (2021) due to the COVID-19 pandemic.[262] Şükrü Saracoğlu Stadium, Fenerbahçe's home field, hosted the 2009 UEFA Cup Final three years after its completion. Türk Telekom Arena opened in 2011 to replace Ali Sami Yen Stadium as Galatasaray's home turf,[263][264] while Vodafone Park, opened in 2016 to replace BJK İnönü Stadium as the home turf of Beşiktaş, hosted the 2019 UEFA Super Cup game. All four stadiums are elite Category 4 (formerly five-star) UEFA stadiums.[h]

The Sinan Erdem Dome, among the largest indoor arenas in Europe, hosted the final of the 2010 FIBA World Championship, the 2012 IAAF World Indoor Championships, as well as the 2011–12 Euroleague and 2016–17 EuroLeague Final Fours.[268] Prior to the completion of the Sinan Erdem Dome in 2010, Abdi İpekçi Arena was Istanbul's primary indoor arena, having hosted the finals of EuroBasket 2001.[269] Several other indoor arenas, including the Beşiktaş Akatlar Arena, have also been inaugurated since 2000, serving as the home courts of Istanbul's sports clubs. The most recent of these is the 13,800-seat Ülker Sports Arena, which opened in 2012 as the home court of Fenerbahçe's basketball teams.[270] Despite the construction boom, five bids for the Summer Olympics—in 2000, 2004, 2008, 2012, and 2020—and national bids for UEFA Euro 2012 and UEFA Euro 2016 have ended unsuccessfully.[271]

The TVF Burhan Felek Sport Hall is one of the major volleyball arenas in the city and hosts clubs such as Eczacıbaşı VitrA, Vakıfbank SK, and Fenerbahçe who have won numerous European and World Championship titles.[citation needed]

Between the 2005–2011 seasons,[272] and in the 2020 season,[273] Istanbul Park racing circuit hosted the Formula One Turkish Grand Prix. The 2021 F1 Turkish Grand Prix was initially cancelled due to the COVID-19 pandemic,[274] but on 25 June 2021, it was announced that the 2021 F1 Turkish Grand Prix will take place on 3 October 2021.[275] Istanbul Park was also a venue of the World Touring Car Championship and the European Le Mans Series in 2005 and 2006, but the track has not seen either of these competitions since then.[276][277] It also hosted the Turkish Motorcycle Grand Prix between 2005 and 2007. Istanbul was occasionally a venue of the F1 Powerboat World Championship, with the last race on the Bosporus strait on 12–13 August 2000.[278][unreliable source?] The last race of the Powerboat P1 World Championship on the Bosporus took place on 19–21 June 2009.[279] Istanbul Sailing Club, established in 1952, hosts races and other sailing events on the waterways in and around Istanbul each year.[280][281]

Media

 
Küçük Çamlıca TV Radio Tower (369 m (1,211 ft)) is the tallest structure in the city.[282]

Most state-run radio and television stations are based in Ankara, but Istanbul is the primary hub of Turkish media. The industry has its roots in the former Ottoman capital, where the first Turkish newspaper, Takvim-i Vekayi (Calendar of Affairs), was published in 1831. The Cağaloğlu street on which the newspaper was printed, Bâb-ı Âli Street, rapidly became the center of Turkish print media, alongside Beyoğlu across the Golden Horn.[283]

Istanbul now has a wide variety of periodicals. Most nationwide newspapers are based in Istanbul, with simultaneous Ankara and İzmir editions.[284] Hürriyet, Sabah, Posta and Sözcü, the country's top four papers, are all headquartered in Istanbul, boasting more than 275,000 weekly sales each.[285] Hürriyet's English-language edition, Hürriyet Daily News, has been printed since 1961, but the English-language Daily Sabah, first published by Sabah in 2014, has overtaken it in circulation. Several smaller newspapers, including popular publications like Cumhuriyet, Milliyet and Habertürk are also based in Istanbul.[284] Istanbul also has long-running Armenian language newspapers, notably the dailies Marmara and Jamanak and the bilingual weekly Agos in Armenian and Turkish.[286]

Radio broadcasts in Istanbul date back to 1927, when Turkey's first radio transmission came from atop the Central Post Office in Eminönü. Control of this transmission, and other radio stations established in the following decades, ultimately came under the state-run Turkish Radio and Television Corporation (TRT), which held a monopoly on radio and television broadcasts between its founding in 1964 and 1990.[287] Today, TRT runs four national radio stations; these stations have transmitters across the country so each can reach over 90 percent of the country's population, but only Radio 2 is based in Istanbul. Offering a range of content from educational programming to coverage of sporting events, Radio 2 is the most popular radio station in Turkey.[287] Istanbul's airwaves are the busiest in Turkey, primarily featuring either Turkish-language or English-language content. One of the exceptions, offering both, is Açık Radyo (94.9 FM). Among Turkey's first private stations, and the first featuring foreign popular music, was Istanbul's Metro FM (97.2 FM). The state-run Radio 3, although based in Ankara, also features English-language popular music, and English-language news programming is provided on NTV Radyo (102.8 FM).[288]

TRT-Children is the only TRT television station based in Istanbul.[289] Istanbul is home to the headquarters of several Turkish stations and regional headquarters of international media outlets. Istanbul-based Star TV was the first private television network to be established following the end of the TRT monopoly; Star TV and Show TV (also based in Istanbul) remain highly popular throughout the country, airing Turkish and American series.[290] Kanal D and ATV are other stations in Istanbul that offer a mix of news and series; NTV (partnered with U.S. media outlet MSNBC) and Sky Turk—both based in the city—are mainly just known for their news coverage in Turkish. The BBC has a regional office in Istanbul, assisting its Turkish-language news operations, and the American news channel CNN established the Turkish-language CNN Türk there in 1999.[291]

Education

 
Main entrance gate of Istanbul University, the city's oldest Turkish institution, established in 1453

As of 2019, excluding universities more than 3.1 million students attended 7,437 schools in Istanbul, about half of the schools being private educational institutions.[292] The average class size was 30 for primary education institutes, 27 for vocational schools and 23 for general high schools.[292] Of the 842 public high schools, 263 are vocational schools, another 263 are Anatolian high schools, 207 are religiously oriented İmam Hatip schools, and 14 are STEM-oriented science high schools.[293] Galatasaray High School was established in 1481 and is the oldest public high school in Turkey.[294] Kabataş Erkek Lisesi, Istanbul Lisesi and Cağaloğlu Anadolu Lisesi are among other public high schools in the city. Istanbul also contains high schools established by the European and American expatriates and missionaries in the 19th century that currently offer secular, foreign-language education such as Robert College, Deutsche Schule Istanbul, Sankt Georgs-Kolleg, Lycée Saint-Joseph and Liceo Italiano di Istanbul.[295] Furthermore Turkish citizens of Jewish, Armenian, Greek and Assyrian descent are allowed to establish and attend their respective schools as granted in the Treaty of Lausanne, Phanar Greek Orthodox College being an example.[296] Most high schools are highly selective and demand high scores from the national standardized exam LGS for admission, with Galatasaray and Robert College only accepting the top 0.1% to 0.01% of the exam takers.[297]

Istanbul contains almost a third of all universities in Turkey. As of 2019 Istanbul has 61 colleges and universities, with more than 1.8 million students enrolled according to official figures. Of those 14 are state-owned, 44 are "foundation-owned" private universities and 3 are foundation-owned vocational universities of higher education. Additionally, there are military academies such as Air Force Academy and Naval Academy as well as 4 foundation-owned vocational universities of higher education which are not affiliated with any university.[298]

 
 
Maçka (left) and Taşkışla (right) campuses of Istanbul Technical University

Some of the most renowned and highly ranked universities in Turkey are in Istanbul. Istanbul University, the nation's oldest institute of higher education, dates back to 1453 and its dental, law, medical schools were founded in the 19th century.The city's largest private universities include Sabancı University, with its main campus in Tuzla, Koç University in Sarıyer, Özyeğin Üniversitesi near Altunizade. Istanbul's first private university, Koç University, was founded as late as 1992, because private universities were not allowed in Turkey before the 1982 amendment to the constitution.[294] Istanbul is also home to several conservatories and art schools, including Mimar Sinan Academy of Fine Arts, founded in 1882.[299]

Public universities with a major presence in the city, such as Istanbul University, Istanbul Technical University (the world's third-oldest university dedicated entirely to engineering, established in 1773), and Boğaziçi University (formerly the higher education section of Robert College until 1971) provide education in English as the primary foreign language, while the primary foreign language of education at Galatasaray University is French (as is the case at Galatasaray High School).[294]

Public services

Istanbul's first water supply systems date back to the city's early history, when aqueducts (such as the Valens Aqueduct) deposited the water in the city's numerous cisterns.[300] At the behest of Suleiman the Magnificent, the Kırkçeşme water supply network was constructed; by 1563, the network provided 4,200 cubic meters (150,000 cu ft) of water to 158 sites each day.[300] In later years, in response to increasing public demand, water from various springs was channeled to public fountains, like the Fountain of Ahmed III, by means of supply lines.[301] Today, Istanbul has a chlorinated and filtered water supply and a sewage treatment system managed by the Istanbul Water and Sewerage Administration (İstanbul Su ve Kanalizasyon İdaresi, İSKİ).[302]

 
The Silahtarağa Power Station, known as SantralIstanbul, part of the Istanbul Bilgi University, was Istanbul's sole source of power between 1914 and 1952.

The Silahtarağa Power Station, a coal-fired power plant along the Golden Horn, was the sole source of Istanbul's electricity between 1914, when its first engine room was completed, and 1952.[303] Following the founding of the Turkish Republic, the plant underwent renovations to accommodate the city's increasing demand; its capacity grew from 23 megawatts in 1923 to a peak of 120 megawatts in 1956.[303][304] Capacity declined until the power station reached the end of its economic life and shut down in 1983.[303] The state-run Turkish Electrical Authority (TEK) briefly—between its founding in 1970 and 1984—held a monopoly on the generation and distribution of electricity, but now the authority—since split between the Turkish Electricity Generation Transmission Company (TEAŞ) and the Turkish Electricity Distribution Company (TEDAŞ)—competes with private electric utilities.[304]

The Ottoman Ministry of Post and Telegraph was established in 1840 and the first post office, the Imperial Post Office, opened near the courtyard of Yeni Mosque. By 1876, the first international mailing network between Istanbul and the lands beyond the Ottoman Empire had been established.[305] Sultan Abdülmecid I issued Samuel Morse his first official honor for the telegraph in 1847, and construction of the first telegraph line—between Istanbul and Edirne—finished in time to announce the end of the Crimean War in 1856.[306]

 
The Grand Post Office in Sirkeci, Istanbul, was designed by Vedat Tek in the Turkish neoclassical style of the early 20th century.[307]

A nascent telephone system began to emerge in Istanbul in 1881 and after the first manual telephone exchange became operational in Istanbul in 1909, the Ministry of Post and Telegraph became the Ministry of Post, Telegraph, and Telephone.[305][308] GSM cellular networks arrived in Turkey in 1994, with Istanbul among the first cities to receive the service.[309] Today, mobile and landline service is provided by private companies, after Türk Telekom, which split from the Ministry of Post, Telegraph, and Telephone in 1995, was privatized in 2005.[305][309] Postal services remain under the purview of what is now the Post and Telegraph Organization (retaining the acronym PTT).[305]

In 2000, Istanbul had 137 hospitals, of which 100 were private.[310][needs update] Turkish citizens are entitled to subsidized healthcare in the nation's state-run hospitals.[284] As public hospitals tend to be overcrowded or otherwise slow, private hospitals are preferable for those who can afford them. Their prevalence has increased significantly over the last decade, as the percentage of outpatients using private hospitals increased from 6 percent to 23 percent between 2005 and 2009.[284][311] Many of these private hospitals, as well as some of the public hospitals, are equipped with high-tech equipment, including MRI machines, or associated with medical research centers.[312] Turkey has more hospitals accredited by the U.S.-based Joint Commission than any other country in the world, with most concentrated in its big cities. The high quality of healthcare, especially in private hospitals, has contributed to a recent upsurge in medical tourism to Turkey (with a 40 percent increase between 2007 and 2008).[313] Laser eye surgery and hair transplant surgery is particularly common among medical tourists, as Turkey is known for specializing in the procedure.[314]

Transportation

Roads

Istanbul's motorways network are the O-1, O-2, O-3, O-4 and O-7. The total length of Istanbul Province's toll motorways network (otoyollar) is 543 km (337 mi) (2021) and the state highways network (devlet yollari) is 353 km (219 mi) (2021), totaling 896 km (557 mi) of expressway roads (minimum 2x2 lanes), excluding secondary roads and urban streets.[315][316][317] The density of expressway network is 16.8 km/100 km2. The O-1 forms the city's inner ring road, traversing the 15 July Martyrs (First Bosphorus) Bridge, and the O-2 is the city's outer ring road, crossing the Fatih Sultan Mehmet (Second Bosphorus) Bridge. The O-2 continues west to Edirne and the O-4 continues east to Ankara. The O-2, O-3, and O-4 are part of European route E80 (the Trans-European Motorway) between Portugal and the Iran–Turkey border.[318] In 2011, the first and second bridges on the Bosphorus carried 400,000 vehicles each day.[319] The O-7[320] or Kuzey Marmara Otoyolu, is a motorway that bypass Istanbul to the north. The O-7 motorway from Kinali Gişeleri to Istanbul Park Service has 139.2 km (86.5 mi), with 8 lanes (4x4), and from Odayeri-K10 to Istanbul Atatürk Airport has 30.4 km (18.9 mi).[317] The completed section of highway crosses the Bosphorus Strait via the Yavuz Sultan Selim (Third Bosphorus) Bridge, entered service on 26 August 2016.[321] The O-7 motorway connects Istanbul Atatürk Airport with Istanbul Airport. Environmentalist groups worry that the third bridge will endanger the remaining green areas to the north of Istanbul.[322][323] Apart from the three Bosphorus Bridges, the dual-deck, 14.6-kilometer (9.1 mi) Eurasia Tunnel (which entered service on 20 December 2016) under the Bosphorus strait also provides road crossings for motor vehicles between the Asian and European sides of Turkey.[324] Road transport emits significant carbon dioxide, estimated at 7 million tons in 2021.[325]

Public transportation

 
 
Istanbul's nostalgic and modern tram systems

Istanbul's local public transportation system is a network of commuter trains, trams, funiculars, metro lines, buses, bus rapid transit, and ferries. Fares across modes are integrated, using the contactless Istanbulkart, introduced in 2009, or the older Akbil electronic ticket device.[326] Trams in Istanbul date back to 1872, when they were horse-drawn, but even the first electrified trams were decommissioned in the 1960s.[327] Operated by Istanbul Electricity, Tramway and Tunnels General Management (İETT), trams slowly returned to the city in the 1990s with the introduction of a nostalgic route and a faster modern tram line, which now carries 265,000 passengers each day.[327][328] The Tünel opened in 1875 as the world's second-oldest subterranean rail line (after London's Metropolitan Railway).[327] It still carries passengers between Karaköy and İstiklal Avenue along a steep 573-meter (1,880 ft) track; a more modern funicular between Taksim Square and Kabataş began running in 2006.[329][330]

 
Marmaray commuter rail at Ayrılıkçeşmesi station

The Istanbul Metro comprises ten lines (the M1, M2, M3, M6, M7, M9 and M11 on the European side, and the M4, M5 and M8 on the Asian side) with several other lines (M12 and M14) and extensions under construction.[331][332] The two sides of Istanbul's metro are connected under the Bosphorus by the Marmaray Tunnel, inaugurated in 2013 as the first rail connection between Thrace and Anatolia, having 13.5 km (8.4 mi) length.[333] The Marmaray tunnel together with the suburban railways lines along the Sea of Marmara, form the intercontinental commuter rail line in Istanbul, named officially B1, from Halkalı on the European side to Gebze on the Asian side. This rail line has 76.6 km (47.6 mi), and the full line opened on 12 March 2019.[334] Until then, buses provide transportation within and between the two-halves of the city, accommodating 2.2 million passenger trips each day.[335] The Metrobus, a form of bus rapid transit, crosses the Bosphorus Bridge, with dedicated lanes leading to its termini.[336]

Ferries

İDO (Istanbul Seabuses) runs a combination of all-passenger ferries and car-and-passenger ferries to ports on both sides of the Bosphorus, as far north as the Black Sea.[337][338] With additional destinations around the Sea of Marmara, İDO runs the largest municipal ferry operation in the world.[339] The city's main cruise ship terminal is the Port of Istanbul in Karaköy, with a capacity of 10,000 passengers per hour.[340] Most visitors enter Istanbul by air, but about half a million foreign tourists enter the city by sea each year.[341][non-primary source needed]

Railroads

 
Originally opened in 1873 with a smaller terminal building as the main terminus of the Rumelia (Balkan) Railway of the Ottoman Empire, which connected Istanbul with Vienna, the current Sirkeci Terminal building was constructed between 1888 and 1890, and became the eastern terminus of the Orient Express from Paris.[342]

International rail service from Istanbul launched in 1889, with a line between Bucharest and Istanbul's Sirkeci Terminal, which ultimately became famous as the eastern terminus of the Orient Express from Paris.[77] Regular service to Bucharest and Thessaloniki continued until the early 2010s, when the former was interrupted for Marmaray construction but started running again in 2019 and the latter was halted due to economic problems in Greece.[343][344] After Istanbul's Haydarpaşa Terminal opened in 1908, it served as the western terminus of the Baghdad Railway and an extension of the Hejaz Railway; today, neither service is offered directly from Istanbul.[345][346][347] Service to Ankara and other points across Turkey is normally offered by Turkish State Railways, but the construction of Marmaray and the Ankara-Istanbul high-speed line forced the station to close in 2012.[348] New stations to replace both the Haydarpaşa and Sirkeci terminals, and connect the city's disjointed railway networks, now the Marmaray second phase opened to the public.[348] Private bus companies still operation to this day. Istanbul's main bus station is the largest in Europe, with a daily capacity of 15,000 buses and 600,000 passengers, serving destinations as distant as Frankfurt.[349][350]

Airports

Istanbul had three large international airports, two of which currently serve commercial passenger flights. The largest is the new Istanbul Airport, opened in 2018 in the Arnavutköy district to the northwest of the city center, on the European side, near the Black Sea coast.

All scheduled commercial passenger flights were transferred from Istanbul Atatürk Airport to Istanbul Airport on 6 April 2019, following the closure of Istanbul Atatürk Airport for scheduled passenger flights.[351] The IATA airport code IST was also transferred to the new airport.[352] Once all phases are completed in 2025, the airport will have six sets of runways (eight in total), 16 taxiways, and will be able to accommodate 200 million passengers a year.[353][354] The transfer from the airport to the city is via the O-7, and it will eventually be linked by two lines of the Istanbul Metro.

Sabiha Gökçen International, 45 kilometers (28 mi) southeast of the city center, on the Asian side, was opened in 2001 to relieve Atatürk. Dominated by low-cost carriers, Istanbul's second airport has rapidly become popular, especially since the opening of a new international terminal in 2009;[355] the airport handled 14.7 million passengers in 2012, a year after Airports Council International named it the world's fastest-growing airport.[356][357] Atatürk had also experienced rapid growth, as its 20.6 percent rise in passenger traffic between 2011 and 2012 was the highest among the world's top 30 airports.[358]

Istanbul Atatürk Airport, located 24 kilometers (15 mi) west of the city center, on the European side, near the Marmara Sea coast, was formerly the city's largest airport. After its closure to commercial flights in 2019, it was briefly used by cargo aircraft and the official state aircraft owned by the Turkish government, until the demolition of its runway began in 2020. It handled 61.3 million passengers in 2015, which made it the third-busiest airport in Europe and the 18th-busiest in the world in that year.[358]

Environment

Flora and fauna

 
Atatürk Arboretum is an arboretum and city forest located in Bahçeköy, Sarıyer.

The natural vegetation cover of the Bosporus region is made up of temperate broadleaf and mixed forests and pseudo-maquis. Chestnut, oak, elm, linden, ash and locust comprises the most prominent tree genera. The most important species belonging to maquis formation are laurel, terebinth, Cercis siliquastrum, broom, red firethorn, and oak species such as Quercus cerris and Quercus coccifera. Apart from the natural flora Platanus orentalis, horse chestnut, cypress and stone pine make up the introduced species that got acclimatized to Istanbul.[359] In a study that examined urban flora in Kartal, a total of 576 plant taxa were recorded; of those 477 were natural and 99 were exotic and cultivated. The most native taxa were in the Asteraceae family (50 species), while the most diverse exotic plant family was Rosaceae (16 species).[360]

Turkish Straits and Sea of Marmara play a vital role for migrating fish and other marine animals between Mediterranean, Marmara and Black Sea. Bosporus hosts pelagic, demersal and semipelagic fish species and more than 130 different taxa have been documented in the strait.[361] Bluefish, bonito, sea bass, horse mackerel and anchovies composes the economically important species. Fish diversity in the waters of Istanbul has dwindled in the recent decades. From around 60 different fish species recorded in the 1970s only 20 of them still survive in the Bosporus.[362][dubious ]Common bottlenose dolphin (Turkish: afalina), short-beaked common dolphin (Turkish: tırtak) and harbor porpoise (Turkish: mutur) make up the marine mammals presently found in the Bosporus and surrounding waters, though since the 1950s the number of dolphin observations has become increasingly rare. Mediterranean monk seals were present in Bosporus, and Princes' Islands and Tuzla shores were seal breeding areas during summer, but they have not been observed in Istanbul since the 1960s and thought to be extinct in the region.[363] Water pollution, overfishing and destruction of coastal habitats caused by urbanization are main threats to Istanbul's marine ecology.

 
Street cats in the city

Wild land mammals are mainly concentrated in the northern forested areas of Istanbul. Roe deer, wild boars, foxes, coyotes, martens, badgers, wolves, weasels, wildcats, squirrels and reed cats have been documented to live inside the boundaries of Istanbul Province.[364] Apart from the wild land mammals Istanbul hosts a sizeable stray animal population. The presence of feral cats in Istanbul (Turkish: sokak kedisi) is noted to be very prevalent, with estimates ranging from a hundred thousand to over a million stray cats. The feral cats in the city have gained widespread media and public attention and are considered to be symbols of the city.[365][366] Rose-ringed parakeet colonies are present in urban areas, similar to other European cities as feral parrots, and considered as invasive species.[367]

Pollution

Air pollution in Turkey is acute in İstanbul with cars, buses and taxis causing frequent urban smog,[368] as it is one of the few European cities without a low-emission zone. As of 2019 the city's mean air quality remains of a level so as to affect the heart and lungs of healthy street bystanders during peak traffic hours,[369] and almost 200 days of pollution were measured by the air pollution sensors at Sultangazi, Mecidiyeköy, Alibeyköy and Kağıthane.[370] It is one of the 10 worst cities for NO2.[371][clarification needed]

Algal blooms and red tides were reported in Sea of Marmara and Bosporus (especially in Golden Horn), and regularly happen in urban lakes such as Lake Büyükçekmece and Küçükçekmece. In June 2021, a marine mucilage wave allegedly caused by water pollution spread to Sea of Marmara.[372]

International relations

See also

Notes

  1. ^ Where governor's office is located.
  2. ^ Greek: Κωνσταντινούπολις, translit. Kōnstantinoúpolis; Latin: Cōnstantīnopolis; Ottoman Turkish: قسطنطينيه, romanized: Ḳosṭanṭīnīye. Names in use until the early 20th century, along with others. See the Toponomy section of this article, or Names of Istanbul for more information.
  3. ^ Istanbul straddles both Europe and Asia, with its commercial and historical centre and two-thirds of the population in Europe, the rest in Asia. Since Istanbul is a transcontinental city, Moscow is the largest city entirely within Europe.
  4. ^ The foundation of Byzantion (Byzantium) is sometimes, especially in encyclopedic or other tertiary sources, placed firmly in 667 BCE. Historians have disputed the precise year the city was founded. Commonly cited is the work of 5th-century-BCE historian Herodotus, which says the city was founded seventeen years after Chalcedon,[35] which came into existence around 685 BCE. Eusebius concurs with 685 BCE as the year Chalcedon was founded, but places Byzantion's establishment in 659 BCE.[36] Among more modern historians, Carl Roebuck proposed the 640s BCE[37] and others have suggested even later. The foundation date of Chalcedon is itself subject to some debate; while many sources place it in 685 BC,[38] others put it in 675 BCE[39] or even 639 BCE (with Byzantion's establishment placed in 619 BCE).[36] Some sources refer to Byzantium's foundation as the 7th century BCE.
  5. ^ a b Historians disagree—sometimes substantially—on population figures of Istanbul (Constantinople), and other world cities, prior to the 20th century. A follow-up to Chandler & Fox 1974,Chandler 1987, pp. 463–505[74] examines different sources' estimates and chooses the most likely based on historical conditions; it is the source of most population figures between 100 and 1914. The ranges of values between 500 and 1000 are due to Morris 2010, which also does a comprehensive analysis of sources, including Chandler (1987); Morris notes that many of Chandler's estimates during that time seem too large for the city's size, and presents smaller estimates. Chandler disagrees with Turan 2010 on the population of the city in the mid-1920s (with the former suggesting 817,000 in 1925), but Turan, p. 224, is used as the source of population figures between 1924 and 2005. Turan's figures, as well as the 2010 figure,[158] come from the Turkish Statistical Institute. The drastic increase in population between 1980 and 1985 is largely due to an enlargement of the city's limits (see the Administration section). Explanations for population changes in pre-Republic times can be inferred from the History section.
  6. ^ In the Ottoman period the inner core of the city, inside the city walls, came to be known as "İstanbul" in Turkish and "Stamboul" in the West. The whole city was generally known as Constantinople or under other names. See Names of Istanbul for further information.[67]
  7. ^ Based on state register data, which is unchangeable and inherited from the family. A married women is also registered to her husband's province.
  8. ^ UEFA does not apparently keep a list of Category 4 stadiums, but regulations stipulate that only these elite stadiums are eligible to host UEFA Champions League Finals,[265] which Atatürk Olympic Stadium did in 2005, and UEFA Europa League (formerly UEFA Cup) Finals,[266] which Şükrü Saracoğlu Stadium did in 2009. Türk Telekom Arena is noted as an elite UEFA stadium by its architects.[267]

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istanbul, other, uses, disambiguation, buul, also, buul, turkish, istanbul, isˈtanbuɫ, formerly, known, constantinople, largest, city, turkey, serving, country, economic, cultural, historic, city, straddles, bosporus, strait, lying, both, europe, asia, populat. For other uses see Istanbul disambiguation Istanbul ˌ ɪ s t ae n ˈ b ʊ l IST an BUUL 8 9 US also ˈ ɪ s t ae n b ʊ l IST an buul Turkish Istanbul isˈtanbuɫ formerly known as Constantinople b is the largest city in Turkey serving as the country s economic cultural and historic hub The city straddles the Bosporus Strait lying in both Europe and Asia and has a population of over 15 million residents comprising 19 of the population of Turkey 4 Istanbul is the most populous European city c and the world s 15th largest city Istanbul IstanbulMetropolitan municipality and provinceBosphorus BridgeHagia SophiaMaiden s TowerOrtakoy MosqueLevent business districtGalata TowerIstiklal AvenueEmblem of Istanbul Metropolitan MunicipalityOpenStreetMapIstanbulLocation within TurkeyShow map of TurkeyIstanbulLocation within EuropeShow map of EuropeIstanbulLocation within AsiaShow map of AsiaCoordinates 41 00 49 N 28 57 18 E 41 01361 N 28 95500 E 41 01361 28 95500Country TurkeyRegionMarmaraProvinceIstanbulProvincial seat a Cagaloglu FatihDistricts39Government TypeMayor council government BodyMunicipal Council of Istanbul MayorEkrem Imamoglu CHP Area 1 2 Urban2 576 85 km2 994 93 sq mi Metro5 343 22 km2 2 063 03 sq mi Highest elevation 3 537 m 1 762 ft Population 31 December 2022 4 Metropolitan municipality and province15 907 951 Rank1st in Turkey 1st in Europe Urban15 569 856 Urban density6 042 km2 15 650 sq mi Metro density2 977 km2 7 710 sq mi Demonym s Istanbulite Turkish Istanbullu GDP Nominal 2022 5 6 Total 276 billion 30 4 of Turkey Per capita 17 349Time zoneUTC 3 TRT Postal code34000 to 34990Area codes 90 212 European side 90 216 Asian side Vehicle registration34HDI 2021 0 867 7 very high 1stGeoTLD ist istanbulWebsiteibb istanbulistanbul gov trUNESCO World Heritage SiteOfficial nameHistoric Areas of IstanbulCriteriaCultural i ii iii iv Reference356bisInscription1985 9th Session Extensions2017Area765 5 ha 1 892 acres The city was founded as Byzantium Greek Byzantion Byzantion in the 7th century BCE by Greek settlers from Megara 10 In 330 CE the Roman emperor Constantine the Great made it his imperial capital renaming it first as New Rome Greek Nea Ῥwmh Nea Rhome Latin Nova Roma 11 and then as Constantinople Constantinopolis after himself 11 12 In 1930 the city s name was officially changed to Istanbul the Turkish rendering of eἰs tὴn Polin romanized eis tḕn Polin to the City the appellation Greek speakers used since the 11th century to colloquially refer to the city 11 The city served as an imperial capital for almost 1600 years during the Roman Byzantine 330 1204 Latin 1204 1261 late Byzantine 1261 1453 and Ottoman 1453 1922 empires 13 The city grew in size and influence eventually becoming a beacon of the Silk Road and one of the most important cities in history The city played a key role in the advancement of Christianity during Roman Byzantine times hosting four of the first seven ecumenical councils before its transformation to an Islamic stronghold following the Fall of Constantinople in 1453 CE especially after becoming the seat of the Ottoman Caliphate in 1517 14 In 1923 after the Turkish War of Independence Ankara replaced the city as the capital of the newly formed Republic of Turkey Istanbul has surpassed London and Dubai to become the most visited city in the world with more than 20 million foreign visitors in 2023 15 The historic centre of Istanbul is a UNESCO World Heritage Site and the city hosts the headquarters of numerous Turkish companies accounting for more than thirty percent of the country s economy 16 17 Contents 1 Toponymy 2 History 2 1 Rise and fall of Constantinople and the Byzantine Empire 2 2 Ottoman Empire and Turkish Republic eras 3 Geography 3 1 Climate 3 1 1 Climate change 4 Cityscape 4 1 Districts and neighborhoods 4 1 1 European side 4 1 2 Asian side 4 1 3 Expansion 4 2 Parks 4 3 Architecture 5 Administration 6 Demographics 6 1 Ethnic and religious groups 7 Politics 8 Economy 9 Culture 9 1 Leisure and entertainment 10 Sports 11 Media 12 Education 13 Public services 14 Transportation 14 1 Roads 14 2 Public transportation 14 3 Ferries 14 4 Railroads 14 5 Airports 15 Environment 15 1 Flora and fauna 15 2 Pollution 16 International relations 17 See also 18 Notes 19 References 19 1 Bibliography 20 External linksToponymyMain article Names of Istanbul nbsp Column of Constantine 18 The first known name of the city is Byzantium Greek Byzantion Byzantion the name given to it at its foundation by Megarian colonists around 657 BCE 11 19 Megarian colonists claimed a direct line back to the founders of the city Byzas the son of the god Poseidon and the nymph Ceroessa 19 Modern excavations have raised the possibility that the name Byzantium might reflect the sites of native Thracian settlements that preceded the fully fledged town 20 Constantinople comes from the Latin name Constantinus after Constantine the Great the Roman emperor who refounded the city in 324 CE 19 Constantinople remained the most common name for the city in the West until the 1930s when Turkish authorities began to press for the use of Istanbul in foreign languages Ḳosṭanṭiniye Ottoman Turkish قسطنطينيه and Istanbul were the names used alternatively by the Ottomans during their rule 21 The name Istanbul Turkish pronunciation isˈtanbuɫ colloquial Turkish pronunciation ɯsˈtambuɫ is commonly held to derive from the Medieval Greek phrase eἰs tὴn Polin pronounced Greek pronunciation is tim ˈbolin which means to the city 22 and is how Constantinople was referred to by the local Greeks This reflected its status as the only major city in the vicinity The importance of Constantinople in the Ottoman world was also reflected by its nickname Der Saadet meaning the Gate to Prosperity in Ottoman Turkish 23 An alternative view is that the name evolved directly from the name Constantinople with the first and third syllables dropped 19 Some Ottoman sources of the 17th century such as Evliya Celebi describe it as the common Turkish name of the time between the late 17th and late 18th centuries it was also in official use The first use of the word Islambol Ottoman Turkish اسلامبول on coinage was in 1730 during the reign of Sultan Mahmud I 24 In modern Turkish the name is written as Istanbul with a dotted I as the Turkish alphabet distinguishes between a dotted and dotless I In English the stress is on the first or last syllable but in Turkish it is on the second syllable tan 25 A person from the city is an Istanbullu plural Istanbullular Istanbulite is used in English 26 HistoryMain article History of Istanbul For a chronological guide see Timeline of Istanbul history nbsp This large keystone might have belonged to a triumphal arch at the Forum of Constantine present day Cemberlitas 18 Historical affiliations Byzantium 667 BC 510 BC nbsp Persian Empire 512 BC 478 BCByzantium Under Athens 478 BC 404 BCByzantium 404 BC 196 CE nbsp Roman Empire 196 395 Capital between 330 395 nbsp Byzantine Empire 395 1204 nbsp Latin Empire 1204 1261 nbsp Byzantine Empire 1261 1453 nbsp Ottoman Empire 1453 1918 nbsp nbsp nbsp nbsp Occupation of Istanbul 1918 1923 nbsp Ankara Government 1923 nbsp Turkey 1923 Present Neolithic artifacts uncovered by archeologists at the beginning of the 21st century indicate that Istanbul s historic peninsula was settled as far back as the 6th millennium BCE 27 That early settlement important in the spread of the Neolithic Revolution from the Near East to Europe lasted for almost a millennium before being inundated by rising water levels 28 27 29 30 The first human settlement on the Asian side the Fikirtepe mound is from the Copper Age period with artifacts dating from 5500 to 3500 BCE 31 On the European side near the point of the peninsula Sarayburnu there was a Thracian settlement during the early 1st millennium BCE Modern authors have linked it to the Thracian toponym Lygos 32 mentioned by Pliny the Elder as an earlier name for the site of Byzantium 33 The history of the city proper begins around 660 BCE 11 34 d when Greek settlers from Megara established Byzantium on the European side of the Bosporus The settlers built an acropolis adjacent to the Golden Horn on the site of the early Thracian settlements fueling the nascent city s economy 40 The city experienced a brief period of Persian rule at the turn of the 5th century BCE but the Greeks recaptured it during the Greco Persian Wars 41 Byzantium then continued as part of the Athenian League and its successor the Second Athenian League before gaining independence in 355 BCE 42 Long allied with the Romans Byzantium officially became a part of the Roman Empire in 73 CE 43 Byzantium s decision to side with the Roman usurper Pescennius Niger against Emperor Septimius Severus cost it dearly by the time it surrendered at the end of 195 CE two years of siege had left the city devastated 44 Five years later Severus began to rebuild Byzantium and the city regained and by some accounts surpassed its previous prosperity 45 Rise and fall of Constantinople and the Byzantine Empire nbsp Originally built by Constantine the Great in the 4th century and later rebuilt by Justinian the Great after the Nika riots in 532 the Hagia Irene is an Eastern Orthodox Church located in the outer courtyard of Topkapi Palace in Istanbul It is one of the few Byzantine era churches that were never converted into mosques during the Ottoman period it served as Topkapi s principal armoury nbsp Originally a church later a mosque the 6th century Hagia Sophia 532 537 by Byzantine emperor Justinian the Great was the largest cathedral in the world for nearly a thousand years until the completion of the Seville Cathedral 1507 in Spain Constantine the Great effectively became the emperor of the whole of the Roman Empire in September 324 46 Two months later he laid out the plans for a new Christian city to replace Byzantium As the eastern capital of the empire the city was named Nova Roma most called it Constantinople a name that persisted into the 20th century 47 On 11 May 330 Constantinople was proclaimed the capital of the Roman Empire which was later permanently divided between the two sons of Theodosius I upon his death on 17 January 395 when the city became the capital of the Eastern Roman Byzantine Empire 48 The establishment of Constantinople was one of Constantine s most lasting accomplishments shifting Roman power eastward as the city became a center of Greek culture and Christianity 48 49 Numerous churches were built across the city including Hagia Sophia which was built during the reign of Justinian the Great and remained the world s largest cathedral for a thousand years 50 Constantine also undertook a major renovation and expansion of the Hippodrome of Constantinople accommodating tens of thousands of spectators the hippodrome became central to civic life and in the 5th and 6th centuries the center of episodes of unrest including the Nika riots 51 52 Constantinople s location also ensured its existence would stand the test of time for many centuries its walls and seafront protected Europe against invaders from the east and the advance of Islam 49 During most of the Middle Ages the latter part of the Byzantine era Constantinople was the largest and wealthiest city on the European continent and at times the largest in the world 53 54 Constantinople is generally considered to be the center and the cradle of Orthodox Christian civilization 55 56 Constantinople began to decline continuously after the end of the reign of Basil II in 1025 The Fourth Crusade was diverted from its purpose in 1204 and the city was sacked and pillaged by the crusaders 57 They established the Latin Empire in place of the Orthodox Byzantine Empire 58 Hagia Sophia was converted to a Catholic church in 1204 The Byzantine Empire was restored albeit weakened in 1261 59 Constantinople s churches defenses and basic services were in disrepair 60 and its population had dwindled to a hundred thousand from half a million during the 8th century e After the reconquest of 1261 however some of the city s monuments were restored and some like the two Deesis mosaics in Hagia Sophia and Kariye were created 61 nbsp The 6th century Basilica Cistern was built by Justinian the Great Various economic and military policies instituted by Andronikos II such as the reduction of military forces weakened the empire and left it vulnerable to attack 62 In the mid 14th century the Ottoman Turks began a strategy of gradually taking smaller towns and cities cutting off Constantinople s supply routes and strangling it slowly 63 On 29 May 1453 after an eight week siege during which the last Roman emperor Constantine XI was killed Sultan Mehmed II the Conqueror captured Constantinople and declared it the new capital of the Ottoman Empire Hours later the sultan rode to the Hagia Sophia and summoned an imam to proclaim the Islamic creed converting the grand cathedral into an imperial mosque due to the city s refusal to surrender peacefully 64 Mehmed declared himself as the new Kayser i Rum the Ottoman Turkish equivalent of the Caesar of Rome and the Ottoman state was reorganized into an empire 65 66 Ottoman Empire and Turkish Republic eras nbsp Map of Istanbul in the 16th century by the Ottoman polymath Matrakci NasuhFollowing the conquest of Constantinople f Mehmed II immediately set out to revitalize the city Cognizant that revitalization would fail without the repopulation of the city Mehmed II welcomed everyone foreigners criminals and runaways showing extraordinary openness and willingness to incorporate outsiders that came to define Ottoman political culture 68 He also invited people from all over Europe to his capital creating a cosmopolitan society that persisted through much of the Ottoman period 69 Revitalizing Istanbul also required a massive program of restorations of everything from roads to aqueducts 70 Like many monarchs before and since Mehmed II transformed Istanbul s urban landscape with wholesale redevelopment of the city center 71 There was a huge new palace to rival if not overshadow the old one a new covered market still standing as the Grand Bazaar porticoes pavilions walkways as well as more than a dozen new mosques 70 Mehmed II turned the ramshackle old town into something that looked like an imperial capital 71 Social hierarchy was ignored by the rampant plague which killed the rich and the poor alike in the 16th century 72 Money could not protect the rich from all the discomforts and harsher sides of Istanbul 72 Although the Sultan lived at a safe remove from the masses and the wealthy and poor tended to live side by side for the most part Istanbul was not zoned as modern cities are 72 Opulent houses shared the same streets and districts with tiny hovels 72 Those rich enough to have secluded country properties had a chance of escaping the periodic epidemics of sickness that blighted Istanbul 72 nbsp View of the Golden Horn and the Seraglio Point from Galata TowerThe Ottoman Dynasty claimed the status of caliphate in 1517 with Constantinople remaining the capital of this last caliphate for four centuries 14 Suleiman the Magnificent s reign from 1520 to 1566 was a period of especially great artistic and architectural achievement chief architect Mimar Sinan designed several iconic buildings in the city while Ottoman arts of ceramics stained glass calligraphy and miniature flourished 73 The population of Constantinople was 570 000 by the end of the 18th century 74 A period of rebellion at the start of the 19th century led to the rise of the progressive Sultan Mahmud II and eventually to the Tanzimat period which produced political reforms and allowed new technology to be introduced to the city 75 Bridges across the Golden Horn were constructed during this period 76 and Constantinople was connected to the rest of the European railway network in the 1880s 77 Modern facilities such as a water supply network electricity telephones and trams were gradually introduced to Constantinople over the following decades although later than to other European cities 78 The modernization efforts were not enough to forestall the decline of the Ottoman Empire 79 nbsp nbsp Two aerial photos showing the Golden Horn and the Bosporus taken from a German zeppelin on 19 March 1918 Sultan Abdul Hamid II was deposed with the Young Turk Revolution in 1908 and the Ottoman Parliament closed since 14 February 1878 was reopened 30 years later on 23 July 1908 which marked the beginning of the Second Constitutional Era 80 A series of wars in the early 20th century such as the Italo Turkish War 1911 1912 and the Balkan Wars 1912 1913 plagued the ailing empire s capital and resulted in the 1913 Ottoman coup d etat which brought the regime of the Three Pashas 81 The Ottoman Empire joined World War I 1914 1918 on the side of the Central Powers and was ultimately defeated The deportation of Armenian intellectuals on 24 April 1915 was among the major events which marked the start of the Armenian genocide during WWI 82 Due to Ottoman and Turkish policies of Turkification and ethnic cleansing the city s Christian population declined from 450 000 to 240 000 between 1914 and 1927 83 The Armistice of Mudros was signed on 30 October 1918 and the Allies occupied Constantinople on 13 November 1918 The Ottoman Parliament was dissolved by the Allies on 11 April 1920 and the Ottoman delegation led by Damat Ferid Pasha was forced to sign the Treaty of Sevres on 10 August 1920 citation needed nbsp A view of Bankalar Caddesi Banks Street in the late 1920s Completed in 1892 the Ottoman Bank headquarters is seen at left In 1995 the Istanbul Stock Exchange moved to Istinye while numerous Turkish banks have moved to Levent and Maslak 84 Following the Turkish War of Independence 1919 1922 the Grand National Assembly of Turkey in Ankara abolished the Sultanate on 1 November 1922 and the last Ottoman Sultan Mehmed VI was declared persona non grata Leaving aboard the British warship HMS Malaya on 17 November 1922 he went into exile and died in Sanremo Italy on 16 May 1926 The Treaty of Lausanne was signed on 24 July 1923 and the occupation of Constantinople ended with the departure of the last forces of the Allies from the city on 4 October 1923 85 Turkish forces of the Ankara government commanded by Sukru Naili Pasha 3rd Corps entered the city with a ceremony on 6 October 1923 which has been marked as the Liberation Day of Istanbul Turkish Istanbul un Kurtulusu and is commemorated every year on its anniversary 85 On 29 October 1923 the Grand National Assembly of Turkey declared the establishment of the Turkish Republic with Ankara as its capital Mustafa Kemal Ataturk became the Republic s first President 86 87 A 1942 wealth tax assessed mainly on non Muslims led to the transfer or liquidation of many businesses owned by religious minorities 88 From the late 1940s and early 1950s Istanbul underwent great structural change as new public squares boulevards and avenues were constructed throughout the city sometimes at the expense of historical buildings 89 The population of Istanbul began to rapidly increase in the 1970s as people from Anatolia migrated to the city to find employment in the many new factories that were built on the outskirts of the sprawling metropolis This sudden sharp rise in the city s population caused a large demand for housing and many previously outlying villages and forests became engulfed into the metropolitan area of Istanbul 90 GeographyFurther information Geography of Turkey and Geology of Turkey nbsp Satellite view of Istanbul and the strait of BosporusIstanbul is located in north western Turkey and straddles the Bosporus Strait which provides the only passage from the Black Sea to the Mediterranean via the Sea of Marmara 16 Historically the city has been ideally situated for trade and defense The confluence of the Sea of Marmara the Bosporus and the Golden Horn provide both ideal defense against enemy attack and a natural toll gate 16 Several picturesque islands Buyukada Heybeliada Burgazada Kinaliada and five smaller islands are part of the city 16 Istanbul s shoreline has grown beyond its natural limits Large sections of Caddebostan sit on areas of landfill increasing the total area of the city to 5 343 square kilometers 2 063 sq mi 16 Despite the myth that seven hills make up the city there are in fact more than 50 hills within the city limits Istanbul s tallest hill Aydos is 537 meters 1 762 ft high 16 The nearby North Anatolian Fault is responsible for much earthquake activity although it does not physically pass through the city itself 91 and a quake of at least magnitude 7 is more likely than not before 2030 and very likely in the 21st century 92 The fault caused the earthquakes in 1766 and 1894 91 The threat of major earthquakes plays a large role in the city s infrastructure development with over 500 000 vulnerable buildings demolished and replaced since 2012 91 The city has repeatedly upgraded its building codes most recently in 2018 93 requiring retrofits for older buildings citation needed and higher engineering standards for new construction Climate Main article Climate of Istanbul nbsp Sile and Kilyos are two seaside resorts on the Black Sea the body of water which tempers Istanbul s climate Istanbul s climate is temperate and is often described as transitional between the Mediterranean climate typical of the western and southern coasts of Turkey and the oceanic climate of the northwestern coasts of the country 94 Much divergence exists in the terminology used to classify the city s climate however The city s summers are warm to hot and moderately dry with an average daytime temperature of about 27 C 81 F and less than 7 days of precipitation per month Despite the generally acceptable temperature range however mid summer in Istanbul is considered moderately uncomfortable due to high dew points and relative humidity 95 Winters meanwhile are cool quite rainy and relatively snow rich for a city with above freezing average temperatures Istanbul s precipitation is unevenly distributed with winter months getting at least twice the level of precipitation of their summerly counterparts The mode of precipitation also varies by season Winter precipitation is generally light persistent and often of mixed precipitation such as rain snow mixes and graupel while summer precipitation is generally abrupt and sporadic Cloudiness as with precipitation varies greatly by season Winters are quite cloudy with around 20 percent of days being sunny or partly cloudy Meanwhile summers experience 60 70 percent of possible sunshine Snowfall is sporadic but accumulates every winter and when it does it is often persistent and disruptive Sea effect snowstorms with more than 30 centimetres 1 ft of snowfall happen almost annually most recently in 2022 96 97 Climate data for Kirecburnu Istanbul normals 1981 2010 snowy days 1996 2011 more data on the main article Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec YearMean daily maximum C F 8 5 47 3 8 7 47 7 10 9 51 6 15 5 59 9 20 1 68 2 25 0 77 0 26 9 80 4 27 2 81 0 23 8 74 8 19 2 66 6 14 2 57 6 10 4 50 7 17 5 63 5 Daily mean C F 5 8 42 4 5 5 41 9 7 3 45 1 11 2 52 2 15 7 60 3 20 5 68 9 22 9 73 2 23 4 74 1 19 9 67 8 15 8 60 4 11 0 51 8 7 8 46 0 13 9 57 0 Mean daily minimum C F 3 5 38 3 2 9 37 2 4 4 39 9 7 8 46 0 12 2 54 0 16 7 62 1 19 7 67 5 20 4 68 7 16 8 62 2 13 2 55 8 8 5 47 3 5 5 41 9 11 0 51 8 Average precipitation mm inches 99 5 3 92 82 1 3 23 69 2 2 72 43 1 1 70 31 5 1 24 40 6 1 60 39 6 1 56 41 9 1 65 64 4 2 54 102 3 4 03 110 3 4 34 125 1 4 93 849 6 33 45 Average precipitation days 0 1 mm 16 9 15 2 13 2 10 0 7 4 7 0 4 7 5 1 8 1 12 3 13 9 17 5 131 3Average snowy days 0 1 cm 4 5 4 7 2 9 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 3 2 7 15 2Mean monthly sunshine hours 68 2 89 6 142 6 180 0 248 0 297 6 319 3 288 3 234 0 158 1 93 0 62 0 2 180 7Mean daily sunshine hours 2 2 3 2 4 6 6 0 8 0 9 6 10 3 9 3 7 8 5 1 3 1 2 0 5 9Percent possible sunshine 22 29 38 46 57 64 69 66 65 46 31 22 46Source 98 99 Climate change Further information Climate change in Turkey nbsp Muze Gazhane in Kadikoy is the first climate change museum in Turkey As with virtually every part of the world climate change is causing more heatwaves 100 droughts 101 storms 102 and flooding 103 104 in Istanbul Furthermore as Istanbul is a large and rapidly expanding city its urban heat island has been intensifying the effects of climate change 105 If trends continue sea level rise is likely to affect city infrastructure for example Kadikoy metro station is threatened with flooding 106 Xeriscaping of green spaces has been suggested 107 and Istanbul has a climate change action plan 108 but not a net zero target 109 51 CityscapeDistricts and neighborhoods See also Historic Areas of Istanbul and List of urban centers in Istanbul nbsp A view of Levent from Kanlica across the BosporusEuropean side The Fatih district which was named after Sultan Mehmed II Turkish Fatih Sultan Mehmed corresponds to what was until the Ottoman conquest in 1453 the whole of the city of Constantinople today is the capital district and called the historic peninsula of Istanbul on the southern shore of the Golden Horn across the medieval Genoese citadel of Galata on the northern shore The Genoese fortifications in Galata were largely demolished in the 19th century leaving only the Galata Tower to make way for the northward expansion of the city 110 Galata Karakoy is today a quarter within the Beyoglu Pera district which forms Istanbul s commercial and entertainment center and includes Istiklal Avenue and Taksim Square 111 Dolmabahce Palace the seat of government during the late Ottoman period is in the Besiktas district on the European shore of the Bosporus strait to the north of Beyoglu The former village of Ortakoy is within Besiktas and gives its name to the Ortakoy Mosque on the Bosporus near the Bosporus Bridge Lining both the European and Asian shores of the Bosporus are the historic yalis luxurious chalet mansions built by Ottoman aristocrats and elites as summer homes 112 Inland north of Taksim Square is the Istanbul Central Business District a set of corridors lined with office buildings residential towers shopping centers and university campuses and over 2 000 000 m2 22 000 000 sq ft of class A office space in total Maslak Levent and Bomonti are important nodes within the CBD 113 114 The Ataturk Airport corridor is another such edge city style business residential and shopping corridor with over 900 000 m2 9 700 000 sq ft of class A office space 114 nbsp Originally outside the city yali residences along the Bosporus are now homes in some of Istanbul s elite neighborhoods Asian side During the Ottoman period Uskudar then Scutari and Kadikoy were outside the scope of the urban area serving as tranquil outposts with seaside yalis and gardens But in the second half of the 20th century the Asian side experienced major urban growth the late development of this part of the city led to better infrastructure and tidier urban planning when compared with most other residential areas in the city 115 Much of the Asian side of the Bosporus functions as a suburb of the economic and commercial centers in European Istanbul accounting for a third of the city s population but only a quarter of its employment 115 However Kozyatagi Atasehir Altunizade Kavacik and Umraniye all together having around 1 4 million sqm of class A office space are now important edge cities i e corridors and nodes of business and shopping centers and of tall residential buildings 114 Expansion As a result of Istanbul s exponential growth in the 20th century a significant portion of the city is composed of gecekondus literally built overnight referring to illegally constructed squatter buildings 116 At present some gecekondu areas are being gradually demolished and replaced by modern mass housing compounds 117 Moreover large scale gentrification and urban renewal projects have been taking place 118 such as the one in Tarlabasi 119 some of these projects like the one in Sulukule have faced criticism 120 The Turkish government also has ambitious plans for an expansion of the city west and northwards on the European side in conjunction with the new Istanbul Airport opened in 2019 the new parts of the city will include four different settlements with specified urban functions housing 1 5 million people 121 Parks nbsp A view of Taksim Square with the Republic Monument 1928 designed by Italian sculptor Pietro Canonica and Taksim MosqueIstanbul does not have a primary urban park but it has several green areas Gulhane Park and Yildiz Park were originally included within the grounds of two of Istanbul s palaces Topkapi Palace and Yildiz Palace but they were repurposed as public parks in the early decades of the Turkish Republic 122 Another park Fethi Pasa Korusu is on a hillside adjacent to the Bosphorus Bridge in Anatolia opposite Yildiz Palace in Europe Along the European side and close to the Fatih Sultan Mehmet Bridge is Emirgan Park which was known as the Kyparades Cypress Forest during the Byzantine period In the Ottoman period it was first granted to Nisanci Feridun Ahmed Bey in the 16th century before being granted by Sultan Murad IV to the Safavid Emir Gune Han in the 17th century hence the name Emirgan The 47 hectare 120 acre park was later owned by Khedive Ismail Pasha of Ottoman Egypt and Sudan in the 19th century Emirgan Park is known for its diversity of plants and an annual tulip festival is held there since 2005 123 The AKP government s decision to replace Taksim Gezi Park with a replica of the Ottoman era Taksim Military Barracks which was transformed into the Taksim Stadium in 1921 before being demolished in 1940 for building Gezi Park sparked a series of nationwide protests in 2013 covering a wide range of issues Popular during the summer among Istanbulites is Belgrad Forest spreading across 5 500 hectares 14 000 acres at the northern edge of the city The forest originally supplied water to the city and remnants of reservoirs used during Byzantine and Ottoman times survive 124 125 nbsp Panoramic view of Istanbul from the confluence of the Bosporus and the Sea of Marmara Several landmarks including Sultan Ahmed Mosque the Hagia Sophia Topkapi Palace and Dolmabahce Palace can be seen along their shores Architecture See also Architecture of Istanbul Ottoman architecture and Architecture of Turkey nbsp Galata Tower dominates the skyline of the medieval Genoese citadel at the north of the Golden Horn Istanbul is primarily known for its Byzantine and Ottoman architecture Despite its development as a Turkish city since 1923 it contains many ancient Roman Byzantine Christian Muslim and Jewish monuments The Neolithic settlement in the Yenikapi quarter on the European side which dates back to c 6500 BCE and predates the formation of the Bosporus strait by approximately a millennium when the Sea of Marmara was still a lake 126 was discovered during the construction of the Marmaray railway tunnel 27 It is the oldest known human settlement on the European side of the city 27 The oldest known human settlement on the Asian side is the Fikirtepe Mound near Kadikoy with relics dating to c 5500 3500 BCE Chalcolithic period There are numerous ancient monuments in the city 127 The most ancient is the Obelisk of Thutmose III Obelisk of Theodosius 127 Built of red granite 31 m 100 ft high it came from the Temple of Karnak in Luxor and was erected there by Pharaoh Thutmose III r 1479 1425 BCE to the south of the seventh pylon 127 The Roman emperor Constantius II r 337 361 CE had it and another obelisk transported along the River Nile to Alexandria for commemorating his ventennalia or 20 years on the throne in 357 The other obelisk was erected on the spina of the Circus Maximus in Rome in the autumn of that year and is now known as the Lateran Obelisk The obelisk that would become the Obelisk of Theodosius remained in Alexandria until 390 CE when Theodosius I r 379 395 CE had it transported to Constantinople and put up on the spina of the Hippodrome there 128 When re erected at the Hippodrome of Constantinople the obelisk was mounted on a decorative base with reliefs that depict Theodosius I and his courtiers 127 The lower part of the obelisk was damaged in antiquity probably during its transport to Alexandria in 357 CE or during its re erection at the Hippodrome of Constantinople in 390 CE As a result the current height of the obelisk is only 18 54 meters or 25 6 meters if the base is included Between the four corners of the obelisk and the pedestal are four bronze cubes used in its transportation and re erection 129 nbsp nbsp nbsp nbsp Built by Ottoman sultans Abdulmecid and Abdulaziz the 19th century Dolmabahce Ciragan Beylerbeyi and Kucuksu palaces on the Bosporus were designed by members of the Armenian Balyan family of court architects 130 Next in age is the Serpent Column from 479 BCE 127 It was brought from Delphi in 324 CE during the reign of Constantine the Great and also erected at the spina of the Hippodrome 127 It was originally part of an ancient Greek sacrificial tripod in Delphi that was erected to commemorate the Greeks who fought and defeated the Persian Empire at the Battle of Plataea 479 BCE The three serpent heads of the 8 meter 26 ft high column remained intact until the end of the 17th century one is on display at the nearby Istanbul Archaeology Museums 131 Built in porphyry and erected at the center of the Forum of Constantine in 330 CE to mark the founding of the new Roman capital the Column of Constantine was originally adorned with a sculpture of the Roman emperor Constantine the Great depicted as the solar god Apollo on its top which fell in 1106 and was later replaced by a cross during the reign of Byzantine emperor Manuel Komnenos r 1143 1180 18 127 There are traces of the Byzantine era throughout the city from ancient churches that were built over early Christian meeting places like the Hagia Irene the Chora Church the Monastery of Stoudios the Church of Sts Sergius and Bacchus the Church of Theotokos Pammakaristos the Monastery of the Pantocrator the Monastery of Christ Pantepoptes the Hagia Theodosia the Church of Theotokos Kyriotissa the Monastery of Constantine Lips the Church of Myrelaion the Hagios Theodoros etc to palaces like the Great Palace of Constantinople and its Mosaic Museum the Palace of the Porphyrogenitus Boukoleon Palace and Palace of Blachernae and other public places and buildings like the Hippodrome the Augustaion the Basilica Cistern Theodosius Cistern Cistern of Philoxenos and Cistern of the Hebdomon the Aqueduct of Valens the Prison of Anemas the Walls of Constantinople and the Porta Aurea Golden Gate among numerous others The 4th century Harbor of Theodosius in Yenikapi once the busiest port in Constantinople was among the numerous archeological discoveries that took place during the excavations of the Marmaray tunnel 27 However it is the Hagia Sophia that fully conveys the period of Constantinople as a city without parallel in Christendom The Hagia Sophia topped by a dome 31 meters 102 ft in diameter over a square space defined by four arches is the pinnacle of Byzantine architecture 132 The Hagia Sophia stood as the world s largest cathedral in the world until it was converted into a mosque in the 15th century 132 The minarets date from that period 132 Because of its historical significance it was reopened as a museum in 1935 However it was re converted into a mosque in July 2020 nbsp Sultan Ahmed Mosque is known as the Blue Mosque due to the blue Iznik tiles which adorn its interior 133 The Obelisk of Thutmose III Obelisk of Theodosius is seen in the foreground Over the next four centuries the Ottomans transformed Istanbul s urban landscape with a vast building scheme that included the construction of towering mosques and ornate palaces The Sultan Ahmed Mosque Blue Mosque another landmark of the city faces the Hagia Sophia at Sultanahmet Square Hippodrome of Constantinople The Suleymaniye Mosque built by Suleiman the Magnificent was designed by his chief architect Mimar Sinan the most illustrious of all Ottoman architects who designed many of the city s renowned mosques and other types of public buildings and monuments 134 Among the oldest surviving examples of Ottoman architecture in Istanbul are the Anadoluhisari and Rumelihisari fortresses which assisted the Ottomans during their siege of the city 135 Over the next four centuries the Ottomans made an indelible impression on the skyline of Istanbul building towering mosques and ornate palaces nbsp A view of Topkapi Palace the inner core of which was built in 1459 1465 from across the Golden Horn with the Prince Islands in the backgroundTopkapi Palace dating back to 1465 is the oldest seat of government surviving in Istanbul Mehmed II built the original palace as his main residence and the seat of government 136 The present palace grew over the centuries as a series of additions enfolding four courtyards and blending neoclassical rococo and baroque architectural forms 137 In 1639 Murad IV made some of the most lavish additions including the Baghdad Kiosk to commemorate his conquest of Baghdad the previous year 138 Government meetings took place here until 1786 when the seat of government was moved to the Sublime Porte 136 After several hundred years of royal residence it was abandoned in 1853 in favor of the baroque Dolmabahce Palace 137 Topkapi Palace became public property following the abolition of monarchy in 1922 137 After extensive renovation it became one of Turkey s first national museums in 1924 136 The imperial mosques include Fatih Mosque Bayezid Mosque Yavuz Selim Mosque Suleymaniye Mosque Sultan Ahmed Mosque the Blue Mosque and Yeni Mosque all of which were built at the peak of the Ottoman Empire in the 16th and 17th centuries In the following centuries and especially after the Tanzimat reforms Ottoman architecture was supplanted by European styles 139 An example of which is the imperial Nuruosmaniye Mosque Areas around Istiklal Avenue were filled with grand European embassies and rows of buildings in Neoclassical Renaissance Revival and Art Nouveau styles which went on to influence the architecture of a variety of structures in Beyoglu including churches stores and theaters and official buildings such as Dolmabahce Palace 140 AdministrationMain articles List of districts of Istanbul and List of neighborhoods of Istanbul nbsp Istanbul s districts extend far from the city center along the full length of the Bosporus with the Black Sea at the top and the Sea of Marmara at the bottom of the map Since 2004 the municipal boundaries of Istanbul have been coincident with the boundaries of its province 141 The city considered capital of the larger Istanbul Province is administered by the Istanbul Metropolitan Municipality IMM Turkish Istanbul Buyuksehir Belediyesi IBB which oversees the 39 districts of the city province The current city structure can be traced back to the Tanzimat period of reform in the 19th century before which Islamic judges and imams led the city under the auspices of the Grand Vizier Following the model of French cities this religious system was replaced by a mayor and a citywide council composed of representatives of the confessional groups millet across the city Pera now Beyoglu was the first area of the city to have its own director and council with members instead being longtime residents of the neighborhood 142 Laws enacted after the Ottoman constitution of 1876 aimed to expand this structure across the city imitating the twenty arrondissements of Paris but they were not fully implemented until 1908 when the city was declared a province with nine constituent districts 143 144 This system continued beyond the founding of the Turkish Republic with the province renamed a belediye municipality but the municipality was disbanded in 1957 145 nbsp Statue of Ataturk in Buyukada the largest of the Prince Islands to the southeast of Istanbul which collectively form the Adalar Isles district of Istanbul ProvinceSmall settlements adjacent to major population centers in Turkey including Istanbul were merged into their respective primary cities during the early 1980s resulting in metropolitan municipalities 146 147 The main decision making body of the Istanbul Metropolitan Municipality is the Municipal Council with members drawn from district councils The Municipal Council of Istanbul is responsible for citywide issues including managing the budget maintaining civic infrastructure and overseeing museums and major cultural centers 148 Since the government operates under a powerful mayor weak council approach the council s leader the metropolitan mayor has the authority to make swift decisions often at the expense of transparency 149 The Municipal Council is advised by the Metropolitan Executive Committee although the committee also has limited power to make decisions of its own 150 All representatives on the committee are appointed by the metropolitan mayor and the council with the mayor or someone of his or her choosing serving as head 150 151 District councils are chiefly responsible for waste management and construction projects within their respective districts They each maintain their own budgets although the metropolitan mayor reserves the right to review district decisions One fifth of all district council members including the district mayors also represent their districts in the Municipal Council 148 All members of the district councils and the Municipal Council including the metropolitan mayor are elected to five year terms 152 Representing the Republican People s Party Ekrem Imamoglu has been the Mayor of Istanbul since 27 June 2019 153 With the Istanbul Metropolitan Municipality and Istanbul Province having equivalent jurisdictions few responsibilities remain for the provincial government Like the MMI the Istanbul Special Provincial Administration has a governor a democratically elected decision making body the Provincial Parliament and an appointed Executive Committee Mirroring the executive committee at the municipal level the Provincial Executive Committee includes a secretary general and leaders of departments that advise the Provincial Parliament 151 154 The Provincial Administration s duties are largely limited to the building and maintenance of schools residences government buildings and roads and the promotion of arts culture and nature conservation 155 Ali Yerlikaya has been the Governor of Istanbul Province since 26 October 2018 156 DemographicsMain article Demographics of Istanbul See also Demographics of Turkey nbsp Istanbul population pyramid in 2022Historical populations Pre RepublicYearPop 10036 000361300 000500400 0007th c 150 350 0008th c 125 500 0009th c 50 250 0001000150 300 0001100200 0001200150 0001261100 000135080 000145345 0001500200 0001550660 0001700700 0001815500 0001860715 0001890874 0001900942 900 RepublicYearPop p a 1925881 000 1927691 000 11 44 1935740 800 0 87 1940793 900 1 39 1945845 300 1 26 1950983 000 3 06 19601 459 500 4 03 19651 743 000 3 61 19702 132 400 4 12 19752 547 400 3 62 19802 853 500 2 30 19855 494 900 14 00 19906 620 200 3 80 19947 615 500 3 56 19978 260 400 2 75 20008 831 800 2 25 200711 174 200 3 42 201514 657 434 3 45 201614 804 116 1 00 201715 029 231 1 52 201815 067 724 0 26 201915 519 267 3 00 Sources Jan Lahmeyer 2004 Chandler 1987 Morris 2010 Turan 2010 157 Pre Republic figures estimated e Throughout most of its history Istanbul has ranked among the largest cities in the world By 500 CE Constantinople had somewhere between 400 000 and 500 000 people edging out its predecessor Rome for the world s largest city 159 Constantinople jostled with other major historical cities such as Baghdad Chang an Kaifeng and Merv for the position of the world s largest city until the 12th century It never returned to being the world s largest but remained the largest city in Europe from 1500 to 1750 when it was surpassed by London 160 The Turkish Statistical Institute estimates that the population of Istanbul Metropolitan Municipality was 15 519 267 at the end of 2019 hosting 19 percent of the country s population 161 64 4 of the residents live on the European side and 35 6 on the Asian side 161 Istanbul ranks as the seventh largest city proper in the world and the second largest urban agglomeration in Europe after Moscow 162 163 The city s annual population growth of 1 5 percent ranks as one of the highest among the seventy eight largest metropolises in the Organisation for Economic Co operation and Development The high population growth mirrors an urbanization trend across the country as the second and third fastest growing OECD metropolises are the Turkish cities of Izmir and Ankara 17 Istanbul experienced especially rapid growth during the second half of the 20th century with its population increasing tenfold between 1950 and 2000 164 This growth was fueled by internal and international migration Istanbul s foreign population with a residence permit increased dramatically from 43 000 in 2007 165 to 856 377 in 2019 166 167 According to 2020 TUIK data around 2 1 million people in a population of over 15 4 million have been registered g in Istanbul meanwhile the vast majority of the residents ultimately originate from Anatolian provinces especially those in the Black Sea Central and Eastern Anatolia regions due to internal migration since the 1950s 168 People registered in Kastamonu Ordu Giresun Erzurum Samsun Malatya Trabzon Sinop and Rize provinces represent the biggest population groups in Istanbul meanwhile people registered in Sivas has the highest percentage with more than 760 thousand residents in the city 169 A 2019 survey found that only 36 of the Istanbul s population was born in the province 170 Ethnic and religious groups Main article Religion in Istanbul See also Assyrians in Turkey Kurds in Istanbul Bosniaks in Turkey Greeks in Turkey Armenians in Turkey Jews in Turkey and Albanians in Turkey Ethnic groups among Turkish citizens in Istanbul 2019 KONDA survey Turks 78 Kurds 17 Zazas 1 Arabs 1 Others 3 Istanbul has been a cosmopolitan city throughout much of its history but it has become more homogenized since the end of the Ottoman era The dominant ethnic group in the city is Turkish people which also forms the majority group in Turkey According to survey data 78 of the voting age Turkish citizens in Istanbul state Turkish as their ethnic identity 170 With estimates ranging from 2 to 4 million Kurds form one of the largest ethnic minorities in Istanbul and are the biggest group after Turks among Turkish citizens 171 172 According to a 2019 KONDA study Kurds constituted around 17 of Istanbul s adult total population who were Turkish citizens 170 Although the initial Kurdish presence in the city dates back to the early Ottoman period 173 the majority of Kurds in the city originate from villages in eastern and southeastern Turkey 174 Zazas are also present in the city and constitute around 1 of the total voting age population 170 Arabs form the city s other largest ethnic minority with an estimated population of more than 2 million 175 Following Turkey s support for the Arab Spring Istanbul emerged as a hub for dissidents from across the Arab world including former presidential candidates from Egypt Kuwaiti MPs and former ministers from Jordan Saudi Arabia including Jamal Khashoggi Syria and Yemen 176 177 178 As of August 2019 the number of refugees of the Syrian Civil War in Turkey residing in Istanbul was estimated to be around 1 million 179 Native Arab population in Turkey who are Turkish citizens are found to be making up less than 1 of city s total adult population 170 As of August 2023 there were more than 530 000 refugees of the Syrian civil war in Istanbul the highest number in any Turkish city 180 nbsp Built by Suleiman the Magnificent the Suleymaniye Mosque 1550 1557 was designed by his chief architect Mimar Sinan the most illustrious of all Ottoman architects 134 2019 survey study by KONDA that examined the religiosity of the voting age adults in Istanbul showed that 57 of the surveyed had a religion and were trying to practise its requirements This was followed by nonobservant people with 26 who identified with a religion but generally did not practise its requirements 11 stated they were fully devoted to their religion meanwhile 6 were non believers who did not believe the rules and requirements of a religion 24 of the surveyed also identified themselves as religious conservatives Around 90 of Istanbul s population are Sunni Muslims and Alevism forms the second biggest religious group 170 181 Into the 19th century the Christians of Istanbul tended to be either Greek Orthodox members of the Armenian Apostolic Church or Catholic Levantines 182 Greeks and Armenians form the largest Christian population in the city While Istanbul s Greek population was exempted from the 1923 population exchange with Greece changes in tax status and the 1955 anti Greek pogrom prompted thousands to leave 183 Following Greek migration to the city for work in the 2010s the Greek population rose to nearly 3 000 in 2019 still greatly diminished since 1919 when it stood at 350 000 183 There are today 50 000 to 70 000 Armenians in Istanbul 184 down from a peak of 164 000 in 1913 185 As of 2019 an estimated 18 000 of the country s 25 000 Christian Assyrians live in Istanbul 186 nbsp There are 234 active churches and chapels in the city 187 including the Church of St Anthony of Padua on Istiklal Avenue in Beyoglu Pera The majority of the Catholic Levantines Turkish Levanten in Istanbul and Izmir are the descendants of traders colonists from the Italian maritime republics of the Mediterranean especially Genoa and Venice and France who obtained special rights and privileges called the Capitulations from the Ottoman sultans in the 16th century 188 The community had more than 15 000 members during Ataturk s presidency in the 1920s and 1930s but today is reduced to only a few hundreds according to Italo Levantine writer Giovanni Scognamillo 189 They continue to live in Istanbul mostly in Karakoy Beyoglu and Nisantasi and Izmir mostly in Karsiyaka Bornova and Buca Istanbul became one of the world s most important Jewish centers in the 16th and 17th century 190 Romaniote and Ashkenazi communities existed in Istanbul before the conquest of Istanbul but it was the arrival of Sephardic Jews that ushered a period of cultural flourishing Sephardic Jews settled in the city after their expulsion from Spain and Portugal in 1492 and 1497 190 Sympathetic to the plight of Sephardic Jews Bayezid II sent out the Ottoman Navy under the command of admiral Kemal Reis to Spain in 1492 in order to evacuate them safely to Ottoman lands 190 In marked contrast to Jews in Europe Ottoman Jews were allowed to work in any profession 191 Ottoman Jews in Istanbul excelled in commerce and came to particularly dominate the medical profession 191 By 1711 using the printing press books came to be published in Spanish and Ladino Yiddish and Hebrew 192 In large part due to emigration to Israel the Jewish population in the city dropped from 100 000 in 1950 193 to 15 000 in 2021 194 195 196 PoliticsPolitically Istanbul is seen as the most important administrative region in Turkey In the run up to local elections in 2019 Erdogan claimed if we fail in Istanbul we will fail in Turkey 197 The contest in Istanbul carried deep political economic and symbolic significance for Erdogan whose election of mayor of Istanbul in 1994 had served as his launchpad 198 For Ekrem Imamoglu winning the mayoralty of Istanbul was a huge moral victory but for Erdogan it had practical ramifications His party AKP lost control of the 4 8 billion municipal budget which had sustained patronage at the point of delivery of many public services for 25 years 199 nbsp Ekrem Imamoglu of the CHP is the 32nd and current Mayor of Istanbul elected in 2019 More recently Istanbul and many of Turkey s metropolitan cities are following a trend away from the government and their right wing ideology In 2013 and 2014 large scale anti AKP government protests began in Istanbul and spread throughout the nation This trend first became evident electorally in the 2014 mayoral election where the center left opposition candidate won an impressive 40 of the vote despite not winning The first government defeat in Istanbul occurred in the 2017 constitutional referendum where Istanbul voted No by 51 4 to 48 6 The AKP government had supported a Yes vote and won the vote nationally due to high support in rural parts of the country The biggest defeat for the government came in the 2019 local elections where their candidate for Mayor former Prime Minister Binali Yildirim was defeated by a very narrow margin by the opposition candidate Ekrem Imamoglu Imamoglu won the vote with 48 77 of the vote against Yildirim s 48 61 but the elections were controversially annulled by the Supreme Electoral Council due to AKP s claim of electoral fraud In the re run Imamoglu gathered 54 22 of the total vote and widened the defeat margin 200 Administratively Istanbul is divided into 39 districts more than any other province in Turkey Istanbul Province sends 98 Members of Parliament to the Grand National Assembly of Turkey which has a total of 600 seats For the purpose of parliamentary elections Istanbul is divided into three electoral districts two on the European side and one on the Asian side electing 28 35 and 35 MPs respectively citation needed Economy nbsp Istanbul has always been the financial capital of Turkey even after Ankara became the new political capital in 1923 Main article Economy of Istanbul Istanbul had the eleventh largest economy among the world s urban areas in 2018 and is responsible for 30 percent of Turkey s industrial output 201 31 percent of GDP 201 and 47 percent of tax revenues 201 The city s gross domestic product adjusted by PPP stood at US 537 507 billion in 2018 202 with manufacturing and services accounting for 36 percent and 60 percent of the economic output respectively 201 Istanbul s productivity is 110 percent higher than the national average 201 Trade is economically important accounting for 30 percent of the economic output in the city 16 In 2019 companies based in Istanbul produced exports worth 83 66 billion and received imports totaling 128 34 billion these figures were equivalent to 47 percent and 61 percent respectively of the national totals 203 Istanbul which straddles the Bosporus strait houses international ports that link Europe and Asia The Bosporus providing the only passage from the Black Sea to the Mediterranean is the world s busiest and narrowest strait used for international navigation with more than 200 million tons of oil passing through it each year 204 International conventions guarantee passage between the Black and the Mediterranean seas 205 even when tankers carry oil LNG LPG chemicals and other flammable or explosive materials as cargo In 2011 as a workaround solution the then Prime Minister Erdogan presented Canal Istanbul a project to open a new strait between the Black and Marmara seas 205 While the project was still on Turkey s agenda in 2020 there has not been a clear date set for it 16 nbsp Deutsche Orientbank AG 1909 in SirkeciShipping is a significant part of the city s economy with 73 9 percent of exports and 92 7 percent of imports in 2018 executed by sea 16 Istanbul has three major shipping ports the Port of Haydarpasa the Port of Ambarli and the Port of Zeytinburnu as well as several smaller ports and oil terminals along the Bosporus and the Sea of Marmara 16 Haydarpasa at the southeastern end of the Bosporus was Istanbul s largest port until the early 2000s 206 Since then operations were shifted to Ambarli with plans to convert Haydarpasa into a tourism complex 16 In 2019 Ambarli on the western edge of the urban center had an annual capacity of 3 104 882 TEUs making it the third largest cargo terminal in the Mediterranean basin 206 Istanbul has been an international banking hub since the 1980s 16 and is home to the only active stock exchange in Turkey Borsa Istanbul which was originally established as the Ottoman Stock Exchange in 1866 207 nbsp Ottoman Central Bank Head Office 1892 on Bankalar CaddesiIn 1995 keeping up with the financial trends Borsa Istanbul moved its headquarters which was originally located on Bankalar Caddesi the financial center of the Ottoman Empire 207 and later at the 4th Vakif Han building in Sirkeci to Istinye in the vicinity of Maslak which hosts the headquarters of numerous Turkish banks 208 Since 2023 the Atasehir district on the Asian side of the city is home to the Istanbul Financial Center IFC where the new headquarters of the state owned Turkish banks including the Turkish Central Bank are located 209 210 As of 2023 the five tallest skyscrapers in Istanbul and Turkey are the 352 m 1 154 ft 10 in tall Turkish Central Bank Tower 211 212 213 214 215 216 in the Atasehir district on the Asian side of the city Metropol Istanbul Tower A 70 floors 301 metres including its twin spires 217 218 219 220 also in the Atasehir district Skyland Istanbul Towers 1 and 2 2 x 284 metres 221 222 located adjacent to Nef Stadium in the Huzur neighbourhood of the Sariyer district on the European side and Istanbul Sapphire 54 floors 238 metres 261 metres including its spire 223 in Levent on the European side of the city 13 4 million foreign tourists visited the city in 2018 making Istanbul the world s fifth most visited city in that year 224 Istanbul and Antalya are Turkey s two largest international gateways receiving a quarter of the nation s foreign tourists Istanbul has more than fifty museums with the Topkapi Palace the most visited museum in the city bringing in more than 30 million in revenue each year 16 Istanbul expects 1 million tourists from cruise companies after the renovation of its cruise port also known as Galataport in Karakoy district 225 nbsp A view of Dolmabahce Palace and the skyscrapers of Levent financial district in the background 226 227 Providing the only sea route to the Black Sea the Bosporus is the world s busiest waterway that is used for international navigation 16 CultureMain article Culture of Istanbul nbsp Yali houses on the Bosporus are among the frequently used settings in Turkish television dramas dizi Istanbul was historically known as a cultural hub but its cultural scene stagnated after the Turkish Republic shifted its focus toward Ankara 228 The new national government established programs that served to orient Turks toward musical traditions especially those originating in Europe but musical institutions and visits by foreign classical artists were primarily centered in the new capital 229 Much of Turkey s cultural scene had its roots in Istanbul and by the 1980s and 1990s Istanbul reemerged globally as a city whose cultural significance is not solely based on its past glory 230 By the end of the 19th century Istanbul had established itself as a regional artistic center with Turkish European and Middle Eastern artists flocking to the city Despite efforts to make Ankara Turkey s cultural heart Istanbul had the country s primary institution of art until the 1970s 231 When additional universities and art journals were founded in Istanbul during the 1980s artists formerly based in Ankara moved in 232 nbsp The Istanbul Archaeology Museums founded by Osman Hamdi Bey in 1891 form Turkey s oldest modern museum 233 Beyoglu has been transformed into the artistic center of the city with young artists and older Turkish artists formerly residing abroad finding footing there Modern art museums including Istanbul State Art and Sculpture Museum National Palaces Painting Museum Istanbul Modern the Pera Museum Sakip Sabanci Museum Arter and SantralIstanbul opened in the 2000s to complement the exhibition spaces and auction houses that have already contributed to the cosmopolitan nature of the city 234 These museums have yet to attain the popularity of older museums on the historic peninsula including the Istanbul Archaeology Museums which ushered in the era of modern museums in Turkey and the Turkish and Islamic Arts Museum 233 nbsp The restored Paket Postanesi Parcel Post Office building is now a symbol of Galataport The district is also home to Museums Square The first film screening in Turkey was at Yildiz Palace in 1896 a year after the technology publicly debuted in Paris 235 Movie theaters rapidly cropped up in Beyoglu with the greatest concentration of theaters being along the street now known as Istiklal Avenue 236 Istanbul also became the heart of Turkey s nascent film industry although Turkish films were not consistently developed until the 1950s 237 Since then Istanbul has been the most popular location to film Turkish dramas and comedies 238 The Turkish film industry ramped up in the second half of the century and with Uzak 2002 and My Father and My Son 2005 both filmed in Istanbul the nation s movies began to see substantial international success 239 Istanbul and its picturesque skyline have also served as a backdrop for several foreign films including From Russia with Love 1963 Topkapi 1964 The World Is Not Enough 1999 and Mission Istaanbul 2008 240 Coinciding with this cultural reemergence was the establishment of the Istanbul Festival which began showcasing a variety of art from Turkey and around the world in 1973 From this flagship festival came the International Istanbul Film Festival and the Istanbul Jazz Festival in the early 1980s With its focus now solely on music and dance the Istanbul Festival has been known as the Istanbul International Music Festival since 1994 241 The most prominent of the festivals that evolved from the original Istanbul Festival is the Istanbul Biennial held every two years since 1987 Its early incarnations were aimed at showcasing Turkish visual art and it has since opened to international artists and risen in prestige to join the elite biennales alongside the Venice Biennale and the Sao Paulo Art Biennial 242 Leisure and entertainment nbsp Istiklal Avenue in BeyogluAbdi Ipekci Street in Nisantasi Galataport Shopping Area in Karakoy and Bagdat Avenue on the Anatolian side of the city have evolved into high end shopping districts 243 244 Other focal points for shopping leisure and entertainment include Nisantasi Ortakoy Bebek and Kadikoy 245 The city has numerous shopping centers from the historic to the modern Istanbul also has an active nightlife and historic taverns a signature characteristic of the city for centuries if not millennia The Grand Bazaar in operation since 1461 is among the world s oldest and largest covered markets 246 247 Mahmutpasha Bazaar is an open air market extending between the Grand Bazaar and the Spice Bazaar which has been Istanbul s major spice market since 1660 Galleria Atakoy ushered in the age of modern shopping malls in Turkey when it opened in 1987 248 Since then malls have become major shopping centers outside the historic peninsula Akmerkez was awarded the titles of Europe s best and World s best shopping mall by the International Council of Shopping Centers in 1995 and 1996 Istanbul Cevahir has been one of the continent s largest since opening in 2005 and Kanyon won the Cityscape Architectural Review Award in the Commercial Built category in 2006 247 Zorlu Center and Istinye Park are among the other upscale malls in Istanbul which include the stores of the world s top fashion brands nbsp Sureyya Opera House is situated on the Asian side of Istanbul and Ataturk Cultural Center is the main opera house on the European side Along Istiklal Avenue is the Cicek Pasaji Flower Passage a 19th century shopping gallery which is today home to winehouses known as meyhanes pubs and restaurants 249 Istiklal Avenue originally known for its taverns has shifted toward shopping but the nearby Nevizade Street is still lined with winehouses and pubs 250 251 Some other neighborhoods around Istiklal Avenue have been revamped to cater to Beyoglu s nightlife with formerly commercial streets now lined with pubs cafes and restaurants playing live music 252 nbsp Zorlu Center designed by EAA and Tabanlioglu Architects includes Zorlu PSM the city s largest performing arts theatre and concert hall Istanbul is known for its historic seafood restaurants Many of the city s most popular and upscale seafood restaurants line the shores of the Bosporus particularly in neighborhoods like Ortakoy Bebek Arnavutkoy Yenikoy Beylerbeyi and Cengelkoy Kumkapi along the Sea of Marmara has a pedestrian zone that hosts around fifty fish restaurants 253 The Princes Islands 15 kilometers 9 mi from the city center are also popular for their seafood restaurants Because of their restaurants historic summer mansions and tranquil car free streets the Prince Islands are a popular vacation destination among Istanbulites and foreign tourists 254 Istanbul is also famous for its sophisticated and elaborately cooked dishes of the Ottoman cuisine Following the influx of immigrants from southeastern and eastern Turkey which began in the 1960s the city s foodscape has drastically changed by the end of the century with influences of Middle Eastern cuisine such as kebab taking an important place in the food scene Restaurants featuring foreign cuisines are mainly concentrated in the Beyoglu Besiktas Sisli and Kadikoy districts Apart from the city s numerous stadiums sports halls and concert halls there are several open air venues for concerts and festivals such as the Cemil Topuzlu Open Air Theatre in Harbiye Paraf Kurucesme Open Air on the Bosphorus shore in Kurucesme and Parkorman in the forest of Maslak The annual Istanbul Jazz Festival has been held every year since 1994 Organized between 2003 and 2013 Rock n Coke was the biggest open air rock festival in Turkey sponsored by Coca Cola It was traditionally held at the Hezarfen Airfield in Istanbul nbsp Abdi Ipekci Street in Nisantasi one of Istanbul s premier shopping streetsThe Istanbul International Music Festival has been held annually since 1973 and the International Istanbul Film Festival has been held annually since 1982 The Istanbul Biennial is a contemporary art exhibition that has been held biennially since 1987 The Istanbul Shopping Fest is an annual shopping festival held since 2011 and Teknofest is an annual festival of aviation aerospace and technology held since 2018 When it was held for the first time in 2003 the annual Istanbul Pride became the first gay pride event in a Muslim majority country 255 Since 2015 all types of parades at Taksim Square and Istiklal Avenue where in 2013 the Gezi Park protests took place have been denied permission by the AKP government citing security concerns but hundreds of people have defied the ban each year Critics have claimed that the bans were in fact due to ideological reasons SportsSee also List of sport facilities in Istanbul nbsp nbsp nbsp nbsp Ataturk Olympic StadiumNef StadiumSukru Saracoglu StadiumVodafone Park Istanbul is home to some of Turkey s oldest sports clubs Besiktas JK established in 1903 is considered the oldest of these sports clubs Due to its initial status as Turkey s only club Besiktas occasionally represented the Ottoman Empire and Turkish Republic in international sports competitions earning the right to place the Turkish flag inside its team logo 256 Galatasaray SK and Fenerbahce SK have fared better in international competitions and have won more Super Lig titles at 22 and 19 times respectively 257 258 259 Galatasaray and Fenerbahce have a long standing rivalry with Galatasaray based in the European part and Fenerbahce based in the Anatolian part of the city 258 Istanbul has seven basketball teams Anadolu Efes Besiktas Darussafaka Fenerbahce Galatasaray Istanbul Buyuksehir Belediyespor and Buyukcekmece that play in the premier level Turkish Basketball Super League 260 Many of Istanbul s sports facilities have been built or upgraded since 2000 to bolster the city s bids for the Summer Olympic Games Ataturk Olympic Stadium the largest multi purpose stadium in Turkey was completed in 2002 as an IAAF first class venue for track and field 261 The stadium hosted the 2005 UEFA Champions League Final and was selected by the UEFA to host the CL Final games of 2020 and 2021 which were relocated to Lisbon 2020 and Porto 2021 due to the COVID 19 pandemic 262 Sukru Saracoglu Stadium Fenerbahce s home field hosted the 2009 UEFA Cup Final three years after its completion Turk Telekom Arena opened in 2011 to replace Ali Sami Yen Stadium as Galatasaray s home turf 263 264 while Vodafone Park opened in 2016 to replace BJK Inonu Stadium as the home turf of Besiktas hosted the 2019 UEFA Super Cup game All four stadiums are elite Category 4 formerly five star UEFA stadiums h The Sinan Erdem Dome among the largest indoor arenas in Europe hosted the final of the 2010 FIBA World Championship the 2012 IAAF World Indoor Championships as well as the 2011 12 Euroleague and 2016 17 EuroLeague Final Fours 268 Prior to the completion of the Sinan Erdem Dome in 2010 Abdi Ipekci Arena was Istanbul s primary indoor arena having hosted the finals of EuroBasket 2001 269 Several other indoor arenas including the Besiktas Akatlar Arena have also been inaugurated since 2000 serving as the home courts of Istanbul s sports clubs The most recent of these is the 13 800 seat Ulker Sports Arena which opened in 2012 as the home court of Fenerbahce s basketball teams 270 Despite the construction boom five bids for the Summer Olympics in 2000 2004 2008 2012 and 2020 and national bids for UEFA Euro 2012 and UEFA Euro 2016 have ended unsuccessfully 271 The TVF Burhan Felek Sport Hall is one of the major volleyball arenas in the city and hosts clubs such as Eczacibasi VitrA Vakifbank SK and Fenerbahce who have won numerous European and World Championship titles citation needed Between the 2005 2011 seasons 272 and in the 2020 season 273 Istanbul Park racing circuit hosted the Formula One Turkish Grand Prix The 2021 F1 Turkish Grand Prix was initially cancelled due to the COVID 19 pandemic 274 but on 25 June 2021 it was announced that the 2021 F1 Turkish Grand Prix will take place on 3 October 2021 275 Istanbul Park was also a venue of the World Touring Car Championship and the European Le Mans Series in 2005 and 2006 but the track has not seen either of these competitions since then 276 277 It also hosted the Turkish Motorcycle Grand Prix between 2005 and 2007 Istanbul was occasionally a venue of the F1 Powerboat World Championship with the last race on the Bosporus strait on 12 13 August 2000 278 unreliable source The last race of the Powerboat P1 World Championship on the Bosporus took place on 19 21 June 2009 279 Istanbul Sailing Club established in 1952 hosts races and other sailing events on the waterways in and around Istanbul each year 280 281 Media nbsp Kucuk Camlica TV Radio Tower 369 m 1 211 ft is the tallest structure in the city 282 Most state run radio and television stations are based in Ankara but Istanbul is the primary hub of Turkish media The industry has its roots in the former Ottoman capital where the first Turkish newspaper Takvim i Vekayi Calendar of Affairs was published in 1831 The Cagaloglu street on which the newspaper was printed Bab i Ali Street rapidly became the center of Turkish print media alongside Beyoglu across the Golden Horn 283 Istanbul now has a wide variety of periodicals Most nationwide newspapers are based in Istanbul with simultaneous Ankara and Izmir editions 284 Hurriyet Sabah Posta and Sozcu the country s top four papers are all headquartered in Istanbul boasting more than 275 000 weekly sales each 285 Hurriyet s English language edition Hurriyet Daily News has been printed since 1961 but the English language Daily Sabah first published by Sabah in 2014 has overtaken it in circulation Several smaller newspapers including popular publications like Cumhuriyet Milliyet and Haberturk are also based in Istanbul 284 Istanbul also has long running Armenian language newspapers notably the dailies Marmara and Jamanak and the bilingual weekly Agos in Armenian and Turkish 286 Radio broadcasts in Istanbul date back to 1927 when Turkey s first radio transmission came from atop the Central Post Office in Eminonu Control of this transmission and other radio stations established in the following decades ultimately came under the state run Turkish Radio and Television Corporation TRT which held a monopoly on radio and television broadcasts between its founding in 1964 and 1990 287 Today TRT runs four national radio stations these stations have transmitters across the country so each can reach over 90 percent of the country s population but only Radio 2 is based in Istanbul Offering a range of content from educational programming to coverage of sporting events Radio 2 is the most popular radio station in Turkey 287 Istanbul s airwaves are the busiest in Turkey primarily featuring either Turkish language or English language content One of the exceptions offering both is Acik Radyo 94 9 FM Among Turkey s first private stations and the first featuring foreign popular music was Istanbul s Metro FM 97 2 FM The state run Radio 3 although based in Ankara also features English language popular music and English language news programming is provided on NTV Radyo 102 8 FM 288 TRT Children is the only TRT television station based in Istanbul 289 Istanbul is home to the headquarters of several Turkish stations and regional headquarters of international media outlets Istanbul based Star TV was the first private television network to be established following the end of the TRT monopoly Star TV and Show TV also based in Istanbul remain highly popular throughout the country airing Turkish and American series 290 Kanal D and ATV are other stations in Istanbul that offer a mix of news and series NTV partnered with U S media outlet MSNBC and Sky Turk both based in the city are mainly just known for their news coverage in Turkish The BBC has a regional office in Istanbul assisting its Turkish language news operations and the American news channel CNN established the Turkish language CNN Turk there in 1999 291 Further information on the monthly publication Mostar magazine EducationFurther information Education in Turkey nbsp Main entrance gate of Istanbul University the city s oldest Turkish institution established in 1453As of 2019 excluding universities more than 3 1 million students attended 7 437 schools in Istanbul about half of the schools being private educational institutions 292 The average class size was 30 for primary education institutes 27 for vocational schools and 23 for general high schools 292 Of the 842 public high schools 263 are vocational schools another 263 are Anatolian high schools 207 are religiously oriented Imam Hatip schools and 14 are STEM oriented science high schools 293 Galatasaray High School was established in 1481 and is the oldest public high school in Turkey 294 Kabatas Erkek Lisesi Istanbul Lisesi and Cagaloglu Anadolu Lisesi are among other public high schools in the city Istanbul also contains high schools established by the European and American expatriates and missionaries in the 19th century that currently offer secular foreign language education such as Robert College Deutsche Schule Istanbul Sankt Georgs Kolleg Lycee Saint Joseph and Liceo Italiano di Istanbul 295 Furthermore Turkish citizens of Jewish Armenian Greek and Assyrian descent are allowed to establish and attend their respective schools as granted in the Treaty of Lausanne Phanar Greek Orthodox College being an example 296 Most high schools are highly selective and demand high scores from the national standardized exam LGS for admission with Galatasaray and Robert College only accepting the top 0 1 to 0 01 of the exam takers 297 Istanbul contains almost a third of all universities in Turkey As of 2019 Istanbul has 61 colleges and universities with more than 1 8 million students enrolled according to official figures Of those 14 are state owned 44 are foundation owned private universities and 3 are foundation owned vocational universities of higher education Additionally there are military academies such as Air Force Academy and Naval Academy as well as 4 foundation owned vocational universities of higher education which are not affiliated with any university 298 nbsp nbsp Macka left and Taskisla right campuses of Istanbul Technical University Some of the most renowned and highly ranked universities in Turkey are in Istanbul Istanbul University the nation s oldest institute of higher education dates back to 1453 and its dental law medical schools were founded in the 19th century The city s largest private universities include Sabanci University with its main campus in Tuzla Koc University in Sariyer Ozyegin Universitesi near Altunizade Istanbul s first private university Koc University was founded as late as 1992 because private universities were not allowed in Turkey before the 1982 amendment to the constitution 294 Istanbul is also home to several conservatories and art schools including Mimar Sinan Academy of Fine Arts founded in 1882 299 Public universities with a major presence in the city such as Istanbul University Istanbul Technical University the world s third oldest university dedicated entirely to engineering established in 1773 and Bogazici University formerly the higher education section of Robert College until 1971 provide education in English as the primary foreign language while the primary foreign language of education at Galatasaray University is French as is the case at Galatasaray High School 294 Public servicesMain article Utilities in Istanbul Further information Telecommunications in Turkey and Health care in Turkey Istanbul s first water supply systems date back to the city s early history when aqueducts such as the Valens Aqueduct deposited the water in the city s numerous cisterns 300 At the behest of Suleiman the Magnificent the Kirkcesme water supply network was constructed by 1563 the network provided 4 200 cubic meters 150 000 cu ft of water to 158 sites each day 300 In later years in response to increasing public demand water from various springs was channeled to public fountains like the Fountain of Ahmed III by means of supply lines 301 Today Istanbul has a chlorinated and filtered water supply and a sewage treatment system managed by the Istanbul Water and Sewerage Administration Istanbul Su ve Kanalizasyon Idaresi ISKI 302 nbsp The Silahtaraga Power Station known as SantralIstanbul part of the Istanbul Bilgi University was Istanbul s sole source of power between 1914 and 1952 The Silahtaraga Power Station a coal fired power plant along the Golden Horn was the sole source of Istanbul s electricity between 1914 when its first engine room was completed and 1952 303 Following the founding of the Turkish Republic the plant underwent renovations to accommodate the city s increasing demand its capacity grew from 23 megawatts in 1923 to a peak of 120 megawatts in 1956 303 304 Capacity declined until the power station reached the end of its economic life and shut down in 1983 303 The state run Turkish Electrical Authority TEK briefly between its founding in 1970 and 1984 held a monopoly on the generation and distribution of electricity but now the authority since split between the Turkish Electricity Generation Transmission Company TEAS and the Turkish Electricity Distribution Company TEDAS competes with private electric utilities 304 The Ottoman Ministry of Post and Telegraph was established in 1840 and the first post office the Imperial Post Office opened near the courtyard of Yeni Mosque By 1876 the first international mailing network between Istanbul and the lands beyond the Ottoman Empire had been established 305 Sultan Abdulmecid I issued Samuel Morse his first official honor for the telegraph in 1847 and construction of the first telegraph line between Istanbul and Edirne finished in time to announce the end of the Crimean War in 1856 306 nbsp The Grand Post Office in Sirkeci Istanbul was designed by Vedat Tek in the Turkish neoclassical style of the early 20th century 307 A nascent telephone system began to emerge in Istanbul in 1881 and after the first manual telephone exchange became operational in Istanbul in 1909 the Ministry of Post and Telegraph became the Ministry of Post Telegraph and Telephone 305 308 GSM cellular networks arrived in Turkey in 1994 with Istanbul among the first cities to receive the service 309 Today mobile and landline service is provided by private companies after Turk Telekom which split from the Ministry of Post Telegraph and Telephone in 1995 was privatized in 2005 305 309 Postal services remain under the purview of what is now the Post and Telegraph Organization retaining the acronym PTT 305 In 2000 Istanbul had 137 hospitals of which 100 were private 310 needs update Turkish citizens are entitled to subsidized healthcare in the nation s state run hospitals 284 As public hospitals tend to be overcrowded or otherwise slow private hospitals are preferable for those who can afford them Their prevalence has increased significantly over the last decade as the percentage of outpatients using private hospitals increased from 6 percent to 23 percent between 2005 and 2009 284 311 Many of these private hospitals as well as some of the public hospitals are equipped with high tech equipment including MRI machines or associated with medical research centers 312 Turkey has more hospitals accredited by the U S based Joint Commission than any other country in the world with most concentrated in its big cities The high quality of healthcare especially in private hospitals has contributed to a recent upsurge in medical tourism to Turkey with a 40 percent increase between 2007 and 2008 313 Laser eye surgery and hair transplant surgery is particularly common among medical tourists as Turkey is known for specializing in the procedure 314 TransportationMain article Public transport in Istanbul The suspension bridges on the Bosporus strait nbsp 15 July Martyrs Bridge nbsp Fatih Sultan Mehmet Bridge nbsp Yavuz Sultan Selim Bridge Roads Istanbul s motorways network are the O 1 O 2 O 3 O 4 and O 7 The total length of Istanbul Province s toll motorways network otoyollar is 543 km 337 mi 2021 and the state highways network devlet yollari is 353 km 219 mi 2021 totaling 896 km 557 mi of expressway roads minimum 2x2 lanes excluding secondary roads and urban streets 315 316 317 The density of expressway network is 16 8 km 100 km2 The O 1 forms the city s inner ring road traversing the 15 July Martyrs First Bosphorus Bridge and the O 2 is the city s outer ring road crossing the Fatih Sultan Mehmet Second Bosphorus Bridge The O 2 continues west to Edirne and the O 4 continues east to Ankara The O 2 O 3 and O 4 are part of European route E80 the Trans European Motorway between Portugal and the Iran Turkey border 318 In 2011 the first and second bridges on the Bosphorus carried 400 000 vehicles each day 319 The O 7 320 or Kuzey Marmara Otoyolu is a motorway that bypass Istanbul to the north The O 7 motorway from Kinali Giseleri to Istanbul Park Service has 139 2 km 86 5 mi with 8 lanes 4x4 and from Odayeri K10 to Istanbul Ataturk Airport has 30 4 km 18 9 mi 317 The completed section of highway crosses the Bosphorus Strait via the Yavuz Sultan Selim Third Bosphorus Bridge entered service on 26 August 2016 321 The O 7 motorway connects Istanbul Ataturk Airport with Istanbul Airport Environmentalist groups worry that the third bridge will endanger the remaining green areas to the north of Istanbul 322 323 Apart from the three Bosphorus Bridges the dual deck 14 6 kilometer 9 1 mi Eurasia Tunnel which entered service on 20 December 2016 under the Bosphorus strait also provides road crossings for motor vehicles between the Asian and European sides of Turkey 324 Road transport emits significant carbon dioxide estimated at 7 million tons in 2021 325 Public transportation nbsp nbsp Istanbul s nostalgic and modern tram systems Istanbul s local public transportation system is a network of commuter trains trams funiculars metro lines buses bus rapid transit and ferries Fares across modes are integrated using the contactless Istanbulkart introduced in 2009 or the older Akbil electronic ticket device 326 Trams in Istanbul date back to 1872 when they were horse drawn but even the first electrified trams were decommissioned in the 1960s 327 Operated by Istanbul Electricity Tramway and Tunnels General Management IETT trams slowly returned to the city in the 1990s with the introduction of a nostalgic route and a faster modern tram line which now carries 265 000 passengers each day 327 328 The Tunel opened in 1875 as the world s second oldest subterranean rail line after London s Metropolitan Railway 327 It still carries passengers between Karakoy and Istiklal Avenue along a steep 573 meter 1 880 ft track a more modern funicular between Taksim Square and Kabatas began running in 2006 329 330 nbsp Bogazici University station of the Istanbul Metro nbsp Marmaray commuter rail at Ayrilikcesmesi station The Istanbul Metro comprises ten lines the M1 M2 M3 M6 M7 M9 and M11 on the European side and the M4 M5 and M8 on the Asian side with several other lines M12 and M14 and extensions under construction 331 332 The two sides of Istanbul s metro are connected under the Bosphorus by the Marmaray Tunnel inaugurated in 2013 as the first rail connection between Thrace and Anatolia having 13 5 km 8 4 mi length 333 The Marmaray tunnel together with the suburban railways lines along the Sea of Marmara form the intercontinental commuter rail line in Istanbul named officially B1 from Halkali on the European side to Gebze on the Asian side This rail line has 76 6 km 47 6 mi and the full line opened on 12 March 2019 334 Until then buses provide transportation within and between the two halves of the city accommodating 2 2 million passenger trips each day 335 The Metrobus a form of bus rapid transit crosses the Bosphorus Bridge with dedicated lanes leading to its termini 336 Ferries IDO Istanbul Seabuses runs a combination of all passenger ferries and car and passenger ferries to ports on both sides of the Bosphorus as far north as the Black Sea 337 338 With additional destinations around the Sea of Marmara IDO runs the largest municipal ferry operation in the world 339 The city s main cruise ship terminal is the Port of Istanbul in Karakoy with a capacity of 10 000 passengers per hour 340 Most visitors enter Istanbul by air but about half a million foreign tourists enter the city by sea each year 341 non primary source needed Railroads nbsp Originally opened in 1873 with a smaller terminal building as the main terminus of the Rumelia Balkan Railway of the Ottoman Empire which connected Istanbul with Vienna the current Sirkeci Terminal building was constructed between 1888 and 1890 and became the eastern terminus of the Orient Express from Paris 342 International rail service from Istanbul launched in 1889 with a line between Bucharest and Istanbul s Sirkeci Terminal which ultimately became famous as the eastern terminus of the Orient Express from Paris 77 Regular service to Bucharest and Thessaloniki continued until the early 2010s when the former was interrupted for Marmaray construction but started running again in 2019 and the latter was halted due to economic problems in Greece 343 344 After Istanbul s Haydarpasa Terminal opened in 1908 it served as the western terminus of the Baghdad Railway and an extension of the Hejaz Railway today neither service is offered directly from Istanbul 345 346 347 Service to Ankara and other points across Turkey is normally offered by Turkish State Railways but the construction of Marmaray and the Ankara Istanbul high speed line forced the station to close in 2012 348 New stations to replace both the Haydarpasa and Sirkeci terminals and connect the city s disjointed railway networks now the Marmaray second phase opened to the public 348 Private bus companies still operation to this day Istanbul s main bus station is the largest in Europe with a daily capacity of 15 000 buses and 600 000 passengers serving destinations as distant as Frankfurt 349 350 Airports Istanbul had three large international airports two of which currently serve commercial passenger flights The largest is the new Istanbul Airport opened in 2018 in the Arnavutkoy district to the northwest of the city center on the European side near the Black Sea coast nbsp Istanbul Airport nbsp Sabiha Gokcen Airport All scheduled commercial passenger flights were transferred from Istanbul Ataturk Airport to Istanbul Airport on 6 April 2019 following the closure of Istanbul Ataturk Airport for scheduled passenger flights 351 The IATA airport code IST was also transferred to the new airport 352 Once all phases are completed in 2025 the airport will have six sets of runways eight in total 16 taxiways and will be able to accommodate 200 million passengers a year 353 354 The transfer from the airport to the city is via the O 7 and it will eventually be linked by two lines of the Istanbul Metro Sabiha Gokcen International 45 kilometers 28 mi southeast of the city center on the Asian side was opened in 2001 to relieve Ataturk Dominated by low cost carriers Istanbul s second airport has rapidly become popular especially since the opening of a new international terminal in 2009 355 the airport handled 14 7 million passengers in 2012 a year after Airports Council International named it the world s fastest growing airport 356 357 Ataturk had also experienced rapid growth as its 20 6 percent rise in passenger traffic between 2011 and 2012 was the highest among the world s top 30 airports 358 Istanbul Ataturk Airport located 24 kilometers 15 mi west of the city center on the European side near the Marmara Sea coast was formerly the city s largest airport After its closure to commercial flights in 2019 it was briefly used by cargo aircraft and the official state aircraft owned by the Turkish government until the demolition of its runway began in 2020 It handled 61 3 million passengers in 2015 which made it the third busiest airport in Europe and the 18th busiest in the world in that year 358 EnvironmentFlora and fauna nbsp Ataturk Arboretum is an arboretum and city forest located in Bahcekoy Sariyer The natural vegetation cover of the Bosporus region is made up of temperate broadleaf and mixed forests and pseudo maquis Chestnut oak elm linden ash and locust comprises the most prominent tree genera The most important species belonging to maquis formation are laurel terebinth Cercis siliquastrum broom red firethorn and oak species such as Quercus cerris and Quercus coccifera Apart from the natural flora Platanus orentalis horse chestnut cypress and stone pine make up the introduced species that got acclimatized to Istanbul 359 In a study that examined urban flora in Kartal a total of 576 plant taxa were recorded of those 477 were natural and 99 were exotic and cultivated The most native taxa were in the Asteraceae family 50 species while the most diverse exotic plant family was Rosaceae 16 species 360 Turkish Straits and Sea of Marmara play a vital role for migrating fish and other marine animals between Mediterranean Marmara and Black Sea Bosporus hosts pelagic demersal and semipelagic fish species and more than 130 different taxa have been documented in the strait 361 Bluefish bonito sea bass horse mackerel and anchovies composes the economically important species Fish diversity in the waters of Istanbul has dwindled in the recent decades From around 60 different fish species recorded in the 1970s only 20 of them still survive in the Bosporus 362 dubious discuss Common bottlenose dolphin Turkish afalina short beaked common dolphin Turkish tirtak and harbor porpoise Turkish mutur make up the marine mammals presently found in the Bosporus and surrounding waters though since the 1950s the number of dolphin observations has become increasingly rare Mediterranean monk seals were present in Bosporus and Princes Islands and Tuzla shores were seal breeding areas during summer but they have not been observed in Istanbul since the 1960s and thought to be extinct in the region 363 Water pollution overfishing and destruction of coastal habitats caused by urbanization are main threats to Istanbul s marine ecology nbsp Street cats in the cityWild land mammals are mainly concentrated in the northern forested areas of Istanbul Roe deer wild boars foxes coyotes martens badgers wolves weasels wildcats squirrels and reed cats have been documented to live inside the boundaries of Istanbul Province 364 Apart from the wild land mammals Istanbul hosts a sizeable stray animal population The presence of feral cats in Istanbul Turkish sokak kedisi is noted to be very prevalent with estimates ranging from a hundred thousand to over a million stray cats The feral cats in the city have gained widespread media and public attention and are considered to be symbols of the city 365 366 Rose ringed parakeet colonies are present in urban areas similar to other European cities as feral parrots and considered as invasive species 367 Pollution Air pollution in Turkey is acute in Istanbul with cars buses and taxis causing frequent urban smog 368 as it is one of the few European cities without a low emission zone As of 2019 update the city s mean air quality remains of a level so as to affect the heart and lungs of healthy street bystanders during peak traffic hours 369 and almost 200 days of pollution were measured by the air pollution sensors at Sultangazi Mecidiyekoy Alibeykoy and Kagithane 370 It is one of the 10 worst cities for NO2 371 clarification needed Algal blooms and red tides were reported in Sea of Marmara and Bosporus especially in Golden Horn and regularly happen in urban lakes such as Lake Buyukcekmece and Kucukcekmece In June 2021 a marine mucilage wave allegedly caused by water pollution spread to Sea of Marmara 372 International relationsList of twin towns and sister cities of IstanbulSee alsoList of people from Istanbul Outline of Istanbul 1766 Istanbul earthquake Caput Mundi List of cities with the most skyscrapersPortals nbsp Turkey nbsp Cities nbsp Europe nbsp AsiaNotes Where governor s office is located Greek Kwnstantinoypolis translit Kōnstantinoupolis Latin Cōnstantinopolis Ottoman Turkish قسطنطينيه romanized Ḳosṭanṭiniye Names in use until the early 20th century along with others See the Toponomy section of this article or Names of Istanbul for more information Istanbul straddles both Europe and Asia with its commercial and historical centre and two thirds of the population in Europe the rest in Asia Since Istanbul is a transcontinental city Moscow is the largest city entirely within Europe The foundation of Byzantion Byzantium is sometimes especially in encyclopedic or other tertiary sources placed firmly in 667 BCE Historians have disputed the precise year the city was founded Commonly cited is the work of 5th century BCE historian Herodotus which says the city was founded seventeen years after Chalcedon 35 which came into existence around 685 BCE Eusebius concurs with 685 BCE as the year Chalcedon was founded but places Byzantion s establishment in 659 BCE 36 Among more modern historians Carl Roebuck proposed the 640s BCE 37 and others have suggested even later The foundation date of Chalcedon is itself subject to some debate while many sources place it in 685 BC 38 others put it in 675 BCE 39 or even 639 BCE with Byzantion s establishment placed in 619 BCE 36 Some sources refer to Byzantium s foundation as the 7th century BCE a b Historians disagree sometimes substantially on population figures of Istanbul Constantinople and other world cities prior to the 20th century A follow up to Chandler amp Fox 1974 Chandler 1987 pp 463 505 74 examines different sources estimates and chooses the most likely based on historical conditions it is the source of most population figures between 100 and 1914 The ranges of values between 500 and 1000 are due to Morris 2010 which also does a comprehensive analysis of sources including Chandler 1987 Morris notes that many of Chandler s estimates during that time seem too large for the city s size and presents smaller estimates Chandler disagrees with Turan 2010 on the population of the city in the mid 1920s with the former suggesting 817 000 in 1925 but Turan p 224 is used as the source of population figures between 1924 and 2005 Turan s figures as well as the 2010 figure 158 come from the Turkish Statistical Institute The drastic increase in population between 1980 and 1985 is largely due to an enlargement of the city s limits see the Administration section Explanations for population changes in pre Republic times can be inferred from the History section In the Ottoman period the inner core of the city inside the city walls came to be known as Istanbul in Turkish and Stamboul in the West The whole city was generally known as Constantinople or under other names See Names of Istanbul for further information 67 Based on state register data which is unchangeable and inherited from the family A married women is also registered to her husband s province UEFA does not apparently keep a list of Category 4 stadiums but regulations stipulate that only these elite stadiums are eligible to host UEFA Champions League Finals 265 which Ataturk Olympic Stadium did in 2005 and UEFA Europa League formerly UEFA Cup Finals 266 which Sukru Saracoglu Stadium did in 2009 Turk Telekom Arena is noted as an elite UEFA stadium by its architects 267 References YETKI ALANI Istanbul Buyuksehir Belediyesi Retrieved 4 February 2020 Istanbul Province 5 460 85 km2Land area 5 343 22 km2Lake Dam 117 63 km2Europe 25 districts 3 474 35 km2Asia 14 districts 1 868 87 km2Urban 36 districts 2 576 85 km2 Metro 39 districts Catalca Silivri Sile According to the size of the population and the status of megacity the limits of the Istanbul city correspond to the limits of the province and the province is treated like as the metropolitan city of Istanbul Istanbul un En Yuksek Tepeleri Hava Forumu Hava Durumu Forumu 15 April 2020 a b The Results of Address Based Population Registration System 2022 Turkish Statistical Institute 31 December 2022 Retrieved 6 February 2023 Ulusal Hesaplar Kisi basina GSYH National Accounts GDP per capita GDP calculated gdp per capita population www tuik gov tr Turkish Statistical Institute Retrieved 8 December 2023 GDP by Provinces 2022 Istanbul had the highest share of GDP with 30 4 Tables 1 and 3 www tuik gov tr Turkish Statistical Institute 7 December 2023 Retrieved 8 December 2023 Sub national HDI Area Database Global Data Lab hdi globaldatalab org Wells John C 2008 Longman Pronunciation Dictionary 3rd ed Longman ISBN 978 1 4058 8118 0 Upton Clive Kretzschmar William A Jr 2017 The Routledge Dictionary of Pronunciation for Current English 2nd ed Routledge p 704 ISBN 978 1 138 12566 7 Judith Herrin 28 September 2009 Byzantium The Surprising Life of a Medieval Empire Princeton University Press p 5 ISBN 978 0 691 14369 9 OCLC 1091569907 a b c d e Istanbul Encyclopaedia Britannica 3 October 2023 Mango Cyril 1991 Constantinople In Kazhdan Alexander ed The Oxford Dictionary of Byzantium Oxford and New York Oxford University Press pp 508 512 ISBN 0 19 504652 8 Celik 1993 p xv a b Masters amp Agoston 2009 pp 114 15 2023 s Top 100 City Destinations Ranking Triumphs and Turmoil Uncovered Euromonitor International Retrieved 12 December 2023 a b c d e f g h i j k l m n Heper Metin 2018 Istanbul Historical dictionary of Turkey 4th ed Lanham MD Rowman amp Littlefield ISBN 978 1 5381 0224 4 a b OECD Territorial Reviews Istanbul Turkey Policy Briefs Organisation for Economic Co operation and Development March 2008 ISBN 978 92 64 04383 1 a b c Forum of Constantine www byzantium1200 com Retrieved 31 January 2021 a b c d Room 2006 p 177 Georgacas 1947 p 352ff Necipoglu 2010 p 262 Necdet Sakaoglu 1993 94a Istanbul un adlari The names of Istanbul In Dunden bugune Istanbul ansiklopedisi ed Turkiye Kultur Bakanligi Istanbul Grosvenor Edwin Augustus 1895 Constantinople Vol 1 Roberts Brothers p 69 Retrieved 15 March 2021 Finkel 2005 pp 57 383 Goksel amp Kerslake 2005 p 27 Keyder 1999 p 95 a b c d e Rainsford Sarah 10 January 2009 Istanbul s ancient past unearthed www bbc com BBC Retrieved 29 May 2021 Algan O Yalcin M N K Ozdogan M Yilmaz Y C Sari E Kirci Elmas E Yilmaz I Bulkan O Ongan D Gazioglu C Nazik A Polat M A Meric E 2011 Holocene coastal change in the ancient harbor of Yenikapi Istanbul and its impact on cultural history Quaternary Research 76 1 30 Bibcode 2011QuRes 76 30A doi 10 1016 j yqres 2011 04 002 S2CID 129280217 Bu kesif tarihi degistirir hurriyet com tr 3 October 2008 Marmaray kazilarinda tarih gun isigina cikti fotogaleri hurriyet com tr Cultural Details of Istanbul Republic of Turkey Minister of Culture and Tourism Archived from the original on 12 September 2007 Retrieved 2 October 2007 Janin Raymond 1964 Constantinople byzantine Paris Institut Francais d Etudes Byzantines pp 10ff Pliny the Elder book IV chapter XI On leaving the Dardanelles we come to the Bay of Casthenes and the promontory of the Golden Horn on which is the town of Byzantium a free state formerly called Lygos it is 711 miles from Durazzo Archived from the original on 1 January 2017 Retrieved 21 June 2015 Bloom amp Blair 2009 p 1 Herodotus Histories 4 144 translated in De Selincourt 2003 p 288 a b Isaac 1986 p 199 Roebuck 1959 p 119 also as mentioned in Isaac 1986 p 199 Lister 1979 p 35 Freely 1996 p 10 Celik 1993 p 11 De Souza 2003 p 88 Freely 1996 p 20 Freely 1996 p 22 Grant 1996 pp 8 10 Limberis 1994 pp 11 12 Barnes 1981 p 77 Barnes 1981 p 212 a b Barnes 1981 p 222 a b Gregory 2010 p 63 Klimczuk amp Warner 2009 p 171 Dash Mike 2 March 2012 Blue Versus Green Rocking the Byzantine Empire Smithsonian Magazine The Smithsonian Institution Archived from the original on 5 August 2012 Retrieved 30 July 2012 Dahmus 1995 p 117 Cantor 1994 p 226 Morris 2010 pp 109 18 Parry Ken 2009 Christianity Religions of the World Infobase Publishing p 139 ISBN 9781438106397 Parry Ken 2010 The Blackwell Companion to Eastern Christianity John Wiley amp Sons p 368 ISBN 9781444333619 Gregory 2010 pp 324 29 Gregory 2010 pp 330 333 Gregory 2010 p 340 Gregory 2010 pp 341 342 Deesis Mosaic Hagia Sophia 5 November 2017 Retrieved 31 January 2021 Reinert 2002 pp 258 260 Baynes 1949 p 47 Gregory 2010 pp 394 399 Behar 1999 p 38 Bideleux amp Jeffries 1998 p 71 Edhem Eldem Istanbul In Agoston Gabor and Bruce Alan Masters Encyclopedia of the Ottoman Empire Infobase Publishing 21 May 2010 ISBN 1 4381 1025 1 ISBN 9781438110257 Start and CITED p 286 Originally the name Istanbul referred only to in the 18th century and For the duration of Ottoman rule western sources continued to refer to the city as Constantinople reserving the name Stamboul for the walled city and Today the use of the name is often deemed politically incorrect by most Turks entry ends with author named on p 290 Inalcik Halil The Policy of Mehmed II toward the Greek Population of Istanbul and the Byzantine Buildings of the City Dumbarton Oaks Papers 23 1969 229 49 p 236 Holt Lambton amp Lewis 1977 pp 306 07 a b Hughes Bettany 2018 Istanbul A Tale of Three Cities London ISBN 978 1 78022 473 2 a href Template Cite book html title Template Cite book cite book a CS1 maint location missing publisher link a b Madden Thomas F 7 November 2017 Istanbul City of Majesty at the Crossroads of the World New York ISBN 978 0 14 312969 1 a href Template Cite book html title Template Cite book cite book a CS1 maint location missing publisher link a b c d e Byrne Joseph Patrick 2012 Encyclopedia of the Black Death Santa Barbara CA ISBN 978 1 59884 253 1 a href Template Cite book html title Template Cite book cite book a CS1 maint location missing publisher link Holt Lambton amp Lewis 1977 pp 735 36 a b Chandler Tertius Fox Gerald 1974 3000 Years of Urban Growth London Academic Press ISBN 978 0 12 785109 9 Shaw amp Shaw 1977 pp 4 6 55 Celik 1993 pp 87 89 a b Harter 2005 p 251 Shaw amp Shaw 1977 pp 230 287 306 Celik Zeynep 1986 The Remaking of Istanbul Portrait of an Ottoman City in the Nineteenth Century Berkeley Los Angeles London University of California Press p 37 Meclis i Mebusan Mebuslar Meclisi Tarihi Olaylar Celik 1993 p 31 Freedman Jeri 2009 The Armenian genocide 1st ed New York Rosen Pub Group pp 21 22 ISBN 978 1 4042 1825 3 Globalization Cosmopolitanism and the Donme in Ottoman Salonica and Turkish Istanbul Marc Baer University of California Irvine Milestones in Borsa Istanbul History www borsaistanbul com Retrieved 31 January 2021 a b 6 Ekim Istanbul un Kurtulusu Sozcu 6 October 2017 Landau 1984 p 50 Dumper amp Stanley 2007 p 39 Agir Seven Artunc Cihan 2019 The Wealth Tax of 1942 and the Disappearance of Non Muslim Enterprises in Turkey The Journal of Economic History 79 1 201 243 doi 10 1017 S0022050718000724 S2CID 159425371 Keyder 1999 pp 11 12 34 36 Efe amp Curebal 2011 pp 718 719 a b c Turkey recovers from one earthquake and braces for more The Economist 5 December 2020 Retrieved 14 December 2020 64 pct chance of Istanbul quake to hit before 2030 Expert Hurriyet 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