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Theodore II Laskaris (Greek: Θεόδωρος Β΄ Λάσκαρις; 1221–1258) was the second emperor of the Empire of Nicaea from 1254 to 1258. He was the son of John III Doukas Vatatzes and Irene of Montferrat. He was a capable and energetic ruler, but his reign was cut short by his early death.