Constantine XI

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Constantine XI

(Constantine Palaeologus), d. 1453, last Byzantine emperor (1449–53), brother and successor of John VIIIJohn VIII
(John Palaeologus), 1390–1448, Byzantine emperor (1425–48), son and successor of Manuel II. When he acceded, the Byzantine Empire had been reduced by the Turks to the city of Constantinople.
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. To secure Western aid against the Turkish assault on what remained of the empire, he proclaimed (1452) the union of the Western and Eastern Churches. No help came, however, and in 1453 Constantine, with some 8,000 Greeks, Venetians, and Genoese, faced 150,000 Turkish besiegers under Sultan Muhammad IIMuhammad II
or Mehmet II
(Muhammad the Conqueror), 1429–81, Ottoman sultan (1451–81), son and successor of Murad II. He is considered the true founder of the Ottoman Empire (Turkey).
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. After almost two months of heroic defense, directed by the emperor, the city and the empire fell. Constantine died fighting with the last of his men.

Constantine XI

1404--53, last Byzantine emperor (1448--53): killed when Constantinople was captured by the Turks