deaths
John III Doukas Vatatzes, Byzantine emperor (born 1193)
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John III Doukas Vatatzes
Emperor of Nicaea from 1221 to 1254
John III Doukas Vatatzes, Latinized as Ducas Vatatzes, was Emperor of Nicaea from 1221 to 1254. He was succeeded by his son, known as Theodore II Doukas Laskaris.Source: Wikipedia (CC BY-SA)