Question: Where was the husband of Irene Laskarina born?
Sentence (from "John III Doukas Vatatzes"): John III Doukas Vatatzes, Latinized as Ducas Vatatzes ("Iōannēs III Doukas Vatatzēs", c. 1193, Didymoteicho – 3 November 1254, Nymphaion), was Emperor of Nicaea from 1222 to 1254.
Relevant evidence: Yes