After his father's death in 1418, John Jacob received the investiture as Marquis by emperor Sigismund. He distinguished himself for some brilliant military campaign in the Apennines area; he also increased his prestige through the marriage between his sister Sofia and the second last Byzantine Emperor, John VIII Palaiologos.
John Jacob's expansion, however, spurred the reaction of the Dukes of Savoy and of Filippo Maria Visconti of Milan. In 1431 they signed an alliance aiming at the cancellation of the Montferrat state. John Jacob was therefore compelled to ask support to France. In 1432 he was defeated anyway and sued for peace, ceding several territories to Savoy but retaining the seigniory over Montferrat, although with the status of Savoy vassal.
However, when Amadeus VIII asked him the payment of the war expenses, John Jacob rebelled; but, after having besieged in Chivasso, he was forced to cease. His state and his prestige were shattered, and he had again to declare himself vassal of Savoy.
john, jacob, marquis, montferrat, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, . This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources John Jacob Marquis of Montferrat news newspapers books scholar JSTOR January 2021 Learn how and when to remove this template message John Jacob Palaeologus Italian Giovanni Giacomo Paleologo March 23 1395 March 12 1445 was the Margrave of Montferrat from 1418 to 1445 John Jacob Marquis of MontferratMarquis of MontferratReign1418 1445PredecessorTheodore II PalaiologosSuccessorJohn IV PalaiologosBornMarch 23 1395TrinoDiedMarch 12 1445 1445 03 12 aged 49 Casale MonferratoNoble familyPalaeologus MontferratSpouse s Joanna of SavoyIssueJohn IV Marquis of MontferratAmadeaIsabellaWilliam VIII Marquis of MontferratBoniface III Marquis of MontferratTeodoro Paleologo di MontferratoFatherTheodore II of MontferratMotherJoanna of BarHe was born in Trino Piedmont the son of Theodore II of Montferrat with whom he collaborated in the government of the marquisate from 1404 His mother was Johanna of Bar daughter of Robert of Bar and Marie of France Duchess of Bar In 1412 he married Joanna of Savoy sister of Duke Amadeus VIII 1 After his father s death in 1418 John Jacob received the investiture as Marquis by emperor Sigismund He distinguished himself for some brilliant military campaign in the Apennines area he also increased his prestige through the marriage between his sister Sofia and the second last Byzantine Emperor John VIII Palaiologos John Jacob s expansion however spurred the reaction of the Dukes of Savoy and of Filippo Maria Visconti of Milan In 1431 they signed an alliance aiming at the cancellation of the Montferrat state John Jacob was therefore compelled to ask support to France In 1432 he was defeated anyway and sued for peace ceding several territories to Savoy but retaining the seigniory over Montferrat although with the status of Savoy vassal However when Amadeus VIII asked him the payment of the war expenses John Jacob rebelled but after having besieged in Chivasso he was forced to cease His state and his prestige were shattered and he had again to declare himself vassal of Savoy John Jacob died at Casale Monferrato in 1445 being succeeded by his son John IV Contents 1 Marriage and children 2 Ancestry 3 References 4 Sources 5 See alsoMarriage and children editJohn Jacob married on April 26 1411 with Joanna of Savoy 1395 1460 daughter of Amadeus VII Count of Savoy and Bonne of Berry They had John IV 1413 1464 Marquis of Montferrat 1445 1464 Amadea 1418 1440 married to John II de Poitiers Lusignan king of Cyprus Isabella ca 1419 1475 married to Ludovico I del Vasto Marquis of Saluzzo William VIII 1422 1483 Marquis of Montferrat 1464 1483 Boniface III 1424 1494 Marquis of Montferrat 1483 1494 Theodoro 1425 1481 cardinal Ancestry editAncestors of John Jacob Marquis of Montferrat16 Andronikos II Palaiologos8 Theodore I Marquis of Montferrat17 Irene of Montferrat4 John II Marquis of Montferrat18 Opicino Spinola9 Argentina Spinola19 Violante of Saluzzo2 Theodore II Marquis of Montferrat20 Ferdinand of Majorca10 James III of Majorca21 Isabelle de Sabran5 Isabella of Majorca22 Alfonso IV of Aragon11 Constance of Aragon23 Teresa d Entenca1 John Jacob Marquis of Montferrat24 Edward I Count of Bar12 Henry IV Count of Bar25 Marie of Burgundy6 Robert I Duke of Bar26 Robert Count of Marle13 Yolande de Dampierre27 Joan of Brittany3 Joanna of Bar28 Philip VI of France14 John II of France29 Joan of Burgundy7 Marie of Valois30 John of Bohemia15 Bonne of Bohemia31 Elisabeth of BohemiaReferences edit Djuric 2009 p 345 Sources editDjuric Ivan 2009 Il Crepuscolo Di Bisanzio I tempi di Giovanni VIII Paleologo in Italian Donzelli Editore See also editWars in LombardyJohn Jacob Marquis of MontferratPalaeologus MontferratCadet branch of the Palaiologos dynastyBorn 23 March 1395 Died 12 March 1445Regnal titlesPreceded byTheodore II Margrave of Montferrat1418 1445 Succeeded byJohn IV Retrieved from https en wikipedia org w index php title John Jacob Marquis of Montferrat amp oldid 1197478155, wikipedia, wiki, book, books, library,
