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Yahya ibn Khalid

Yahya ibn Khalid (Arabic: يحيى بن خالد, romanizedYahyā ibn Khālid; died 806 CE) was the most prominent member of the Barmakid family, serving as provincial governor and all-powerful long-time vizier to Caliph Harun al-Rashid before his abrupt fall in 803.

Yahya ibn Khalid
يحيى بن خالد
"Mansur brought before Yahya Barmaki". An illustration to the Akhbar-i Barmakiyan, created in Mughal India, dated c. 1595-1600
Diedc. 806
Abbasid Caliphate
Other namesAbu al-Fadl
Occupation(s)Abbasid vizier and Court official
Years activec. 786 – 803
Children
Parent

Origin and early career edit

Yahya was the son of Khalid ibn Barmak, the first member of the family to achieve prominence in the Abbasid court, serving as de facto chief minister to the first Abbasid caliph, al-Saffah (r. 749–754), and then in a number of provincial governorships in Fars, Tabaristan, and Mosul under al-Mansur (r. 754–775).[1][2] Yahya gained his first experience in administration as his father's aide.[3]

 
Map of the Abbasid Caliphate and its provinces in the late 8th century
 
"Yahya Ibn Khalid al-Barmaki returning the jewel sent to him by Zubayda, the wife of Harun al-Rashid". An illustration from the Akhbar-i-Barmakiyan, created in Mughal India, dated c. 1595-1600

When his father was governor of Tabaristan in northern Iran (766/67–772), Yahya was appointed as his representative in Rayy, where the Caliph's son and heir, the future al-Mahdi (r. 775–785), was serving as viceroy for the eastern caliphate.[4] While there, the two men became close, to the point that when al-Mahdi's younger son, the future Harun al-Rashid (r. 786–809) was born, he was nursed by Yahya's wife, Zubayda bint Munir, while al-Mahdi's wife, al-Khayzuran, nursed Yahya's young son al-Fadl, who had been born a few days earlier.[4][5] This unique, and apparently accidental, relationship created strong bonds between them that proved crucial for the future fate of the Barmakids;[4] by Arab custom, ties of fosterage were equivalent to blood kinship.[2]

Already in 775, Yahya was himself appointed governor of Adharbayjan.[3] When his father entered his second governorship of Fars under al-Mahdi (r. 775–785), Yahya once again accompanied him as his assistant.[3]

In 778, he was named as the tutor and secretary to Harun, replacing Aban ibn Sadaka,[3] and enhancing their relationship: Yahya became a sort of father figure to the young prince, while in turn Yahya and his family attached their fortunes to Harun.[6] When Harun was sent, as his first independent command, to lead an expedition against the Byzantine Empire in 780, Yahya accompanied him. Yahya was placed in charge of the army's supplies, while he and the chamberlain al-Rabi ibn Yunus (who would become a political ally of Yahya) functioned as advisors to Harun on all military decisions. The expedition was a modest success, resulting in the capture of the fortress of Samalu, further strengthening Yahya's position.[3][7] When Harun was proclaimed second heir (after his older brother, al-Hadi) and given charge of the provinces of Adharbayjan and Arminiya, Yahya administered these on his behalf.[3]

Under al-Hadi edit

When al-Mahdi died suddenly while hunting in July 785, Yahya was instrumental in ensuring a smooth succession and avoiding a riot of the troops, who were likely to use the opportunity to extract several years' of payment from the exchequer. Yahya and Queen al-Khayzuran kept the death secret, dismissed the troops with a gift of 200 dirhams, buried al-Mahdi, and sent for al-Hadi, who was then at Juzjan, to come to Baghdad and take over the throne. After the truth became known, the troops rioted and secured a payment of two years' worth of their salaries, but the immediate crisis had been averted.[8]

After al-Hadi's accession, Yahya was confirmed in his position, but soon became involved in the struggle for the succession.[3] Al-Hadi, now caliph, wanted to remove his brother from the succession and appoint his own son, Ja'far, instead. Harun himself appeared to be ready to acquiesce to this demotion, but this threatened Yahya's own position, which was dependent on Harun's status as heir-apparent. Consequently, along with al-Rabi ibn Yunus and the influential and powerful queen-mother al-Khayzuran, he tried to uphold Harun's position. At this time, Queen al-Khayzuran was the most powerful person in the caliphate, and al-Hadi hated this immense authority of his mother. Unlike al-Khayzuran, who did not hide her hostility to her older son, Yahya tried to mediate between the two brothers, urging Harun to a firmer defence of his rights, and al-Hadi to a more conciliatory stance.[9] The rivalry between the two brothers was also the expression of a wider conflict, between a military faction, favoured by al-Hadi, and a courtly/bureaucratic faction, that rallied behind the Barmakids and al-Rabi ibn Yunus, with Harun as their candidate. The former clung to the traditional prerogatives of the troops that had brought the Abbasids to power, especially in the role of military leaders as provincial governors, while the newly emerging class of civil administrators (the kuttāb) and palace officials desired both a greater share of power as well as a centralization of authority in the central government and its civil departments.[10]

In the end, in September 786, matters came to a head: Yahya was imprisoned and was about to be executed, but on the same night, al-Hadi was found dead. The exact cause of al-Hadi's death is unknown, but several sources imply that al-Khayzuran was responsible, by having one of her slave-girls suffocate the caliph in his sleep.[3][11] On the same night, al-Hadi's young son was arrested and forced to renounce his rights to the succession, and the new regime installed.[12][13] According to one version reported by al-Tabari, Harun freed Yahya once he was seated on the throne,[14] while according to another, Yahya hurried to wake his sleeping protégé with the words, "Arise, O Commander of the Faithful".[15]

Yahya's vizierate and the Barmakid regime edit

Have you not seen that the sun was sickly,
but when Harun assumed power, its light gleamed forth.
Through the auspicious effects of the trusted one of God, Harun, the munificent one?
For Harun is its ruler, and Yahya its vizier.

Poem by the court poet Ibrahim al-Mawsili on Harun al-Rashid's accession, relayed by al-Tabari[16]

With Harun safely ensconced on the throne, Yahya was named vizier, with plenipotentiary authority over all affairs of government, as well as a free hand in choosing personnel.[3] Even after the death of Queen-mother al-Khayzuran, Yahya was also awarded the position of keeper of the seal, with the sources reporting that the Caliph handed over his seal in person, to symbolize the powers vested in his vizier.[3] Nevertheless, until her death in 789, al-Khayzuran remained in power control, with Yahya relying to her opinion and orders. The Caliph gave strict orders to Yahya to seek al-Khayzuran's approval in all of his decisions, a regulation which reduced the status of the Vizier to a subordinate of the queen mother. Her death changed everything; Yahya and his family (Barmakid) were out of her control, but lost a strong supporter.[16][17]

Yahya made his two older sons, al-Fadl and Ja'far, his associates, sharing with them all duties and powers of his office, to the point that they also held the caliphal seal, and appear to also have been designated as viziers.[3] From 788 until 795, Yahya's brother, Muhammad, also served as the Harun al-Rashid's chamberlain.[18] This concentration of power inaugurated the period known in the sources as the "reign of the Barmakids" (sulṭān Āl Barmak).[3] This was an era of comparative peace and prosperity, when even the entries in al-Tabari's chronicle are unusually brief due to the lack of noteworthy events.[19]

As the representatives of the civil bureaucratic faction, the new Barmakid regime was characterized by the centralization of power in Baghdad: provincial governors lost in importance, especially as they were regularly changed after very brief tenures, in stark contrast to the long terms customary under al-Mansur.[20] In the same manner, the central oversight of the fiscal administration of the provinces was tightened, with inspectors sent out to investigate allegations of abuses, and governors obliged to bring the revenue of their province and their accounts with them to the capital for auditing.[21]

Over the years, the tasks of governance devolved more and more to Yahya's sons, and in 798, he asked for leave to retire to Mecca, during one of the Caliph's pilgrimages there.[17][22] This did not last long, as within a year he was back at his post in Baghdad.[17][23]

Patronage of scholars edit

Yahya was distinguished for his patronage of scholars and poets, and especially for sponsoring a massive translation effort of Indian works from Sanskrit to Arabic. In terms of bringing knowledge to the Arabic world, Yahya's efforts were not matched until al-Biruni's Indica in the 11th century.[2] Apart from the translations, Yahya also brought numerous Indian physicians to Baghdad, in a specially constructed hospital.[2] He commissioned the poet Aban al-Lahiqi to put the stories of Kalīla wa-Dimna, Mazdak, and Bilawhar wa-Būdhāsaf into verse; the latter especially was likely translated from Sanskrit for the Barmakids as well.[2] In the anecdotes relayed by the chroniclers, Yahya also appears "as the host of numerous learned sessions and discussions among diverse participants" (van Bladel),[2] while Hugh Kennedy stresses that "the literary assemblies the Barmakids held were notable for the freedom with which unusual opin- ions were voiced".[24]

Downfall and death edit

The major weakness of the Barmakids' position was their lack of support among the military. The old military leadership was dismissed following Harun al-Rashid's accession, but the Barmakids' own attempts to recruit a power base among the soldiers failed, and their inability to suppress the Kharijite revolt of Walid ibn Tarif in 794—itself caused by the Barmakids' harsh fiscal measures—led the Caliph to turn to a representative of the old military elites, Yazid ibn Mazyad al-Shaybani, for help.[24]

Following this, the old military establishment gradually returned to favour, and the Barmakids' monopoly on power was broken. From 796/7 on, the Barmakids found themselves challenged not only with a resurgent military elite,[25] but also at the centre, where the Caliph dismissed Yahya's brother Muhammad and appointed instead as his chamberlain al-Fadl ibn al-Rabi, the son of Yahya's old ally, al-Rabi ibn Yunus.[26] Al-Fadl ibn al-Rabi's access to the Caliph made him the centre of a rival court faction,[27] and in the anecdotes of the time he appears both as the Barmakids' foil and their main antagonist at court.[28] This change was not only the result of the Barmakids' own weakness, but apparently a conscious policy by Harun al-Rashid, who endeavoured to limit his dependency on the Barmakids.[25] The Barmakids' more lenient attitudes towards the Alids, whom Harun continued to persecute, further widened the rift between the Caliph and the Barmakids, as seen in the protracted affair of Yahya ibn Abdallah.[24]

In 803, his family fell into disgrace, and he was cast into prison, where he died in 806.

Legacy edit

As the historian Hugh N. Kennedy writes, although Yahya was perhaps the dominant court figure of his time, "it is difficult to form a clear idea of [Yahya's] talents and achievements. Many of the stories about his life read more like exemplars written to show how a good minister and bureaucrat should behave and what he should accomplish , rather than as a historical record", the result of his idealization in the eyes of successive generations of Abbasid officials.[4]

Family tree edit

References edit

  1. ^ Barthold & Sourdel 1960, pp. 1033–1034.
  2. ^ a b c d e f van Bladel 2012.
  3. ^ a b c d e f g h i j k l Barthold & Sourdel 1960, p. 1034.
  4. ^ a b c d Kennedy 2006, p. 41.
  5. ^ Bosworth 1989, pp. 91–92.
  6. ^ Kennedy 2006, pp. 42, 53.
  7. ^ Kennedy 2006, p. 42.
  8. ^ Kennedy 2006, pp. 58–60, 184.
  9. ^ Kennedy 2006, pp. 42, 60, 184–185.
  10. ^ Kennedy 2004, pp. 137–138.
  11. ^ Kennedy 2006, pp. 61, 185.
  12. ^ Kennedy 2006, p. 61.
  13. ^ Bosworth 1989, p. 96.
  14. ^ Bosworth 1989, p. 92.
  15. ^ Bosworth 1989, pp. 94–95.
  16. ^ a b Bosworth 1989, p. 98.
  17. ^ a b c Kennedy 2006, p. 63.
  18. ^ Barthold & Sourdel 1960, p. 1036.
  19. ^ Kennedy 2006, p. 62.
  20. ^ Kennedy 2004, pp. 138–139, 140.
  21. ^ Kennedy 2004, p. 140.
  22. ^ Bosworth 1989, p. 166.
  23. ^ Bosworth 1989, p. 168.
  24. ^ a b c Kennedy 2004, p. 141.
  25. ^ a b Kennedy 2004, pp. 141–142.
  26. ^ Bosworth 1989, pp. 152–153.
  27. ^ Kennedy 2004, p. 142.
  28. ^ Kennedy 2006, pp. 33, 79.

Sources edit

yahya, khalid, arabic, يحيى, بن, خالد, romanized, yahyā, khālid, died, most, prominent, member, barmakid, family, serving, provincial, governor, powerful, long, time, vizier, caliph, harun, rashid, before, abrupt, fall, يحيى, بن, خالد, mansur, brought, before,. Yahya ibn Khalid Arabic يحيى بن خالد romanized Yahya ibn Khalid died 806 CE was the most prominent member of the Barmakid family serving as provincial governor and all powerful long time vizier to Caliph Harun al Rashid before his abrupt fall in 803 Yahya ibn Khalid يحيى بن خالد Mansur brought before Yahya Barmaki An illustration to the Akhbar i Barmakiyan created in Mughal India dated c 1595 1600Diedc 806Abbasid CaliphateOther namesAbu al FadlOccupation s Abbasid vizier and Court officialYears activec 786 803ChildrenJa far Al Fadl Muhammad MusaParentKhalid ibn Barmak father Contents 1 Origin and early career 2 Under al Hadi 3 Yahya s vizierate and the Barmakid regime 4 Patronage of scholars 5 Downfall and death 6 Legacy 7 Family tree 8 References 9 SourcesOrigin and early career editYahya was the son of Khalid ibn Barmak the first member of the family to achieve prominence in the Abbasid court serving as de facto chief minister to the first Abbasid caliph al Saffah r 749 754 and then in a number of provincial governorships in Fars Tabaristan and Mosul under al Mansur r 754 775 1 2 Yahya gained his first experience in administration as his father s aide 3 nbsp Map of the Abbasid Caliphate and its provinces in the late 8th century nbsp Yahya Ibn Khalid al Barmaki returning the jewel sent to him by Zubayda the wife of Harun al Rashid An illustration from the Akhbar i Barmakiyan created in Mughal India dated c 1595 1600When his father was governor of Tabaristan in northern Iran 766 67 772 Yahya was appointed as his representative in Rayy where the Caliph s son and heir the future al Mahdi r 775 785 was serving as viceroy for the eastern caliphate 4 While there the two men became close to the point that when al Mahdi s younger son the future Harun al Rashid r 786 809 was born he was nursed by Yahya s wife Zubayda bint Munir while al Mahdi s wife al Khayzuran nursed Yahya s young son al Fadl who had been born a few days earlier 4 5 This unique and apparently accidental relationship created strong bonds between them that proved crucial for the future fate of the Barmakids 4 by Arab custom ties of fosterage were equivalent to blood kinship 2 Already in 775 Yahya was himself appointed governor of Adharbayjan 3 When his father entered his second governorship of Fars under al Mahdi r 775 785 Yahya once again accompanied him as his assistant 3 In 778 he was named as the tutor and secretary to Harun replacing Aban ibn Sadaka 3 and enhancing their relationship Yahya became a sort of father figure to the young prince while in turn Yahya and his family attached their fortunes to Harun 6 When Harun was sent as his first independent command to lead an expedition against the Byzantine Empire in 780 Yahya accompanied him Yahya was placed in charge of the army s supplies while he and the chamberlain al Rabi ibn Yunus who would become a political ally of Yahya functioned as advisors to Harun on all military decisions The expedition was a modest success resulting in the capture of the fortress of Samalu further strengthening Yahya s position 3 7 When Harun was proclaimed second heir after his older brother al Hadi and given charge of the provinces of Adharbayjan and Arminiya Yahya administered these on his behalf 3 Under al Hadi editWhen al Mahdi died suddenly while hunting in July 785 Yahya was instrumental in ensuring a smooth succession and avoiding a riot of the troops who were likely to use the opportunity to extract several years of payment from the exchequer Yahya and Queen al Khayzuran kept the death secret dismissed the troops with a gift of 200 dirhams buried al Mahdi and sent for al Hadi who was then at Juzjan to come to Baghdad and take over the throne After the truth became known the troops rioted and secured a payment of two years worth of their salaries but the immediate crisis had been averted 8 After al Hadi s accession Yahya was confirmed in his position but soon became involved in the struggle for the succession 3 Al Hadi now caliph wanted to remove his brother from the succession and appoint his own son Ja far instead Harun himself appeared to be ready to acquiesce to this demotion but this threatened Yahya s own position which was dependent on Harun s status as heir apparent Consequently along with al Rabi ibn Yunus and the influential and powerful queen mother al Khayzuran he tried to uphold Harun s position At this time Queen al Khayzuran was the most powerful person in the caliphate and al Hadi hated this immense authority of his mother Unlike al Khayzuran who did not hide her hostility to her older son Yahya tried to mediate between the two brothers urging Harun to a firmer defence of his rights and al Hadi to a more conciliatory stance 9 The rivalry between the two brothers was also the expression of a wider conflict between a military faction favoured by al Hadi and a courtly bureaucratic faction that rallied behind the Barmakids and al Rabi ibn Yunus with Harun as their candidate The former clung to the traditional prerogatives of the troops that had brought the Abbasids to power especially in the role of military leaders as provincial governors while the newly emerging class of civil administrators the kuttab and palace officials desired both a greater share of power as well as a centralization of authority in the central government and its civil departments 10 In the end in September 786 matters came to a head Yahya was imprisoned and was about to be executed but on the same night al Hadi was found dead The exact cause of al Hadi s death is unknown but several sources imply that al Khayzuran was responsible by having one of her slave girls suffocate the caliph in his sleep 3 11 On the same night al Hadi s young son was arrested and forced to renounce his rights to the succession and the new regime installed 12 13 According to one version reported by al Tabari Harun freed Yahya once he was seated on the throne 14 while according to another Yahya hurried to wake his sleeping protege with the words Arise O Commander of the Faithful 15 Yahya s vizierate and the Barmakid regime editHave you not seen that the sun was sickly but when Harun assumed power its light gleamed forth Through the auspicious effects of the trusted one of God Harun the munificent one For Harun is its ruler and Yahya its vizier Poem by the court poet Ibrahim al Mawsili on Harun al Rashid s accession relayed by al Tabari 16 With Harun safely ensconced on the throne Yahya was named vizier with plenipotentiary authority over all affairs of government as well as a free hand in choosing personnel 3 Even after the death of Queen mother al Khayzuran Yahya was also awarded the position of keeper of the seal with the sources reporting that the Caliph handed over his seal in person to symbolize the powers vested in his vizier 3 Nevertheless until her death in 789 al Khayzuran remained in power control with Yahya relying to her opinion and orders The Caliph gave strict orders to Yahya to seek al Khayzuran s approval in all of his decisions a regulation which reduced the status of the Vizier to a subordinate of the queen mother Her death changed everything Yahya and his family Barmakid were out of her control but lost a strong supporter 16 17 Yahya made his two older sons al Fadl and Ja far his associates sharing with them all duties and powers of his office to the point that they also held the caliphal seal and appear to also have been designated as viziers 3 From 788 until 795 Yahya s brother Muhammad also served as the Harun al Rashid s chamberlain 18 This concentration of power inaugurated the period known in the sources as the reign of the Barmakids sulṭan Al Barmak 3 This was an era of comparative peace and prosperity when even the entries in al Tabari s chronicle are unusually brief due to the lack of noteworthy events 19 As the representatives of the civil bureaucratic faction the new Barmakid regime was characterized by the centralization of power in Baghdad provincial governors lost in importance especially as they were regularly changed after very brief tenures in stark contrast to the long terms customary under al Mansur 20 In the same manner the central oversight of the fiscal administration of the provinces was tightened with inspectors sent out to investigate allegations of abuses and governors obliged to bring the revenue of their province and their accounts with them to the capital for auditing 21 Over the years the tasks of governance devolved more and more to Yahya s sons and in 798 he asked for leave to retire to Mecca during one of the Caliph s pilgrimages there 17 22 This did not last long as within a year he was back at his post in Baghdad 17 23 Patronage of scholars editFurther information Indian influence on Islamic science Yahya was distinguished for his patronage of scholars and poets and especially for sponsoring a massive translation effort of Indian works from Sanskrit to Arabic In terms of bringing knowledge to the Arabic world Yahya s efforts were not matched until al Biruni s Indica in the 11th century 2 Apart from the translations Yahya also brought numerous Indian physicians to Baghdad in a specially constructed hospital 2 He commissioned the poet Aban al Lahiqi to put the stories of Kalila wa Dimna Mazdak and Bilawhar wa Budhasaf into verse the latter especially was likely translated from Sanskrit for the Barmakids as well 2 In the anecdotes relayed by the chroniclers Yahya also appears as the host of numerous learned sessions and discussions among diverse participants van Bladel 2 while Hugh Kennedy stresses that the literary assemblies the Barmakids held were notable for the freedom with which unusual opin ions were voiced 24 Downfall and death editThe major weakness of the Barmakids position was their lack of support among the military The old military leadership was dismissed following Harun al Rashid s accession but the Barmakids own attempts to recruit a power base among the soldiers failed and their inability to suppress the Kharijite revolt of Walid ibn Tarif in 794 itself caused by the Barmakids harsh fiscal measures led the Caliph to turn to a representative of the old military elites Yazid ibn Mazyad al Shaybani for help 24 Following this the old military establishment gradually returned to favour and the Barmakids monopoly on power was broken From 796 7 on the Barmakids found themselves challenged not only with a resurgent military elite 25 but also at the centre where the Caliph dismissed Yahya s brother Muhammad and appointed instead as his chamberlain al Fadl ibn al Rabi the son of Yahya s old ally al Rabi ibn Yunus 26 Al Fadl ibn al Rabi s access to the Caliph made him the centre of a rival court faction 27 and in the anecdotes of the time he appears both as the Barmakids foil and their main antagonist at court 28 This change was not only the result of the Barmakids own weakness but apparently a conscious policy by Harun al Rashid who endeavoured to limit his dependency on the Barmakids 25 The Barmakids more lenient attitudes towards the Alids whom Harun continued to persecute further widened the rift between the Caliph and the Barmakids as seen in the protracted affair of Yahya ibn Abdallah 24 In 803 his family fell into disgrace and he was cast into prison where he died in 806 Legacy editAs the historian Hugh N Kennedy writes although Yahya was perhaps the dominant court figure of his time it is difficult to form a clear idea of Yahya s talents and achievements Many of the stories about his life read more like exemplars written to show how a good minister and bureaucrat should behave and what he should accomplish rather than as a historical record the result of his idealization in the eyes of successive generations of Abbasid officials 4 Family tree editvteFamily tree of the BarmakidsBarmakKhalidSulaymanal HasanYahyaMuhammadJa faral FadlMuhammadMusaal AbbasJa farImranAhmad Jahza Source Barthold W amp Sourdel D 1960 al Baramika In Gibb H A R Kramers J H Levi Provencal E Schacht J Lewis B amp Pellat Ch eds The Encyclopaedia of Islam Second Edition Volume I A B Leiden E J Brill pp 1033 1036 OCLC 495469456 References edit Barthold amp Sourdel 1960 pp 1033 1034 a b c d e f van Bladel 2012 a b c d e f g h i j k l Barthold amp Sourdel 1960 p 1034 a b c d Kennedy 2006 p 41 Bosworth 1989 pp 91 92 Kennedy 2006 pp 42 53 Kennedy 2006 p 42 Kennedy 2006 pp 58 60 184 Kennedy 2006 pp 42 60 184 185 Kennedy 2004 pp 137 138 Kennedy 2006 pp 61 185 Kennedy 2006 p 61 Bosworth 1989 p 96 Bosworth 1989 p 92 Bosworth 1989 pp 94 95 a b Bosworth 1989 p 98 a b c Kennedy 2006 p 63 Barthold amp Sourdel 1960 p 1036 Kennedy 2006 p 62 Kennedy 2004 pp 138 139 140 Kennedy 2004 p 140 Bosworth 1989 p 166 Bosworth 1989 p 168 a b c Kennedy 2004 p 141 a b Kennedy 2004 pp 141 142 Bosworth 1989 pp 152 153 Kennedy 2004 p 142 Kennedy 2006 pp 33 79 Sources editAbbas I 1988 Barmakids In Yarshater Ehsan ed Encyclopaedia Iranica Volume III 8 Bardesanes Bayhaqi Ẓahir al Din London and New York Routledge amp Kegan Paul pp 806 809 ISBN 978 0 71009 120 8 Barthold W amp Sourdel D 1960 al Baramika In Gibb H A R Kramers J H Levi Provencal E Schacht J Lewis B amp Pellat Ch eds The Encyclopaedia of Islam Second Edition Volume I A B Leiden E J Brill pp 1033 1036 OCLC 495469456 Bosworth C E ed 1989 The History of al Ṭabari Volume XXX The ʿAbbasid Caliphate in Equilibrium The Caliphates of Musa al Hadi and Harun al Rashid A D 785 809 A H 169 192 SUNY Series in Near Eastern Studies Albany New York State University of New York Press ISBN 978 0 88706 564 4 Crone Patricia 1980 Slaves on Horses The Evolution of the Islamic Polity Cambridge Cambridge University Press ISBN 0 521 52940 9 Kennedy Hugh 2004 The Prophet and the Age of the Caliphates The Islamic Near East from the 6th to the 11th Century Second ed Harlow Longman ISBN 978 0 582 40525 7 Kennedy Hugh 2006 When Baghdad Ruled the Muslim World The Rise and Fall of Islam s Greatest Dynasty Cambridge Massachusetts Da Capo Press ISBN 978 0 306814808 van Bladel Kevin 2012 Barmakids In Fleet Kate Kramer Gudrun Matringe Denis Nawas John Rowson Everett eds Encyclopaedia of Islam 3rd ed Brill Online ISSN 1873 9830 Retrieved from https en wikipedia org w index php title Yahya ibn Khalid amp oldid 1179213109, wikipedia, wiki, book, books, library,

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