Theodore II Doukas Laskaris Θεόδωρος Β΄ Δούκας Λάσκαρις Emperor and Autocrat of the Romans (Claimant) Portrait of Theodore II from a 15th-century manuscript Emperor of Nicaea Claimant Byzantine Emperor Reign 1254–1258[1] Predecessor John III Doukas Vatatzes Successor John IV Laskaris Born c. 1222 Nicaea, modern Iznik, Turkey Died (1258-08-18)18 August 1258 Magnesia,[2] modern Turkey Spouse Elena of Bulgaria Issue John IV Doukas Laskaris Irene Doukaina Laskarina Maria Doukaina Laskarina Eudoxia Laskarina Dynasty Laskaris Father John III Doukas Vatatzes Mother Irene Lascarina