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John III Doukas Vatatzes

Emperor of Nicaea

7 dated entries naming John III Doukas Vatatzes, drawn from 7 separate years between 1193 CE and 1254 CE. Nothing here is written by us: each line is the sentence a Wikipedia year article used, and the link beside it opens the exact revision.

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12th century

  • 1193John III (Doukas Vatatzes), emperor of Nicaea (d. 1254)source

13th century

  • 1221November – Emperor Theodore I Laskaris dies after a 16-year reign and is succeeded by his son-in-law John III Doukas Vatatzes. John fends off Theodore's brothers, who believe that they have the better claim for the throne of the Empire of Nicaea. In December, he becomes the sole ruler, and during his reign, the Empire becomes the most powerful of the Byzantine successor states and the frontrunner in the race to recover Constantinople from the Latin Empire. John also cultivates a close relationship with Frederick II, Holy Roman Emperor, and negotiates with Pope Honorius III about the possibility of reuniting the Church.source
  • 1223January 4 – Germanus II takes office as Patriarch of Constantinople, leader of the Eastern Orthodox Church, after moving the patriarchate's capital 56 mi from Constantinople (now Istanbul) to Nicaea (now Iznik in Turkey), as the guest of John III Doukas Vatatzes, Emperor of Nicaea.source
  • 1224Spring – Battle of Poimanenon: Byzantine forces under Emperor John III (Doukas Vatatzes', ruler of Nicaea, defeat the Latin army under the brothers Alexios Laskaris and Isaac Laskaris. They begin a revolt and decide to aid the request of Emperor Robert I of Courtenay. The two armies meet at Poimanenon, south of Cyzicus in Mysia, near Lake Kuş ("Bird Lake"). In the ensuing battle, John III achieves a decisive victory; among the captives taken are the two Laskaris brothers, who are blinded. The victory opens the way for the recovery by the Byzantines of most of the Latin possessions in Asia Minor.source
  • 1235Siege of Constantinople: The Byzantine emperor John III Doukas Vatatzes and the Bulgarian tsar Ivan Asen II besiege Constantinople in an attempt to take it from its Latin rulers, John of Brienne and Baldwin II. Angelo Sanudo successfully negotiates a two-year truce.source
  • 1246November – Michael II Asen, ruler (tsar) of the Bulgarian Empire, succeeds his brother Kaliman I (possibly poisoned). He confirms the reconquest of Bulgarian territories against John III (Doukas Vatatzes), Byzantine ruler of the Empire of Nicaea.source
  • 1254November 3 – John III Doukas Vatatzes, Byzantine emperorsource

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