John III Doukas Vatatzes | |||||
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Emperor and Autocrat of the Romans | |||||
![]() 15th-century portrait of John III (from a 15th-century codex containing a copy of the Extracts of History by Joannes Zonaras) | |||||
Emperor of Nicaea Claimant Byzantine Emperor | |||||
Reign | December 1221 – 3 November 1254 | ||||
Predecessor | Theodore I Laskaris | ||||
Successor | Theodore II Laskaris | ||||
Born | c. 1192 Didymoteicho, Byzantine Empire | ||||
Died | 3 November 1254 (aged 62) Nymphaion, Byzantine Empire | ||||
Burial | Monastery of Sosandra, region of Magnesia | ||||
Spouses | Irene Laskarina Anna of Hohenstaufen | ||||
Issue | Theodore II Laskaris | ||||
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House | Vatatzes | ||||
Father | Basil Vatatzes (?) | ||||
Mother | Unknown | ||||
Religion | Eastern Orthodox |
John III Doukas Vatatzes, Latinized as Ducas Vatatzes (Greek: Ἱωάννης Δούκας Βατάτζης, Iōannēs Doukas Vatatzēs, c. 1192 – 3 November 1254), was Emperor of Nicaea from 1221 to 1254. He was succeeded by his son, known as Theodore II Laskaris.