Parents: Manuel II, emperor of Constantinople, and Helena of Serbia
Born: 18 December 1392
House: Palaeologos
Spouse(s): (1) Anna, daughter of Basil I, grand prince of Moscow, and Sophia of Lithuania, then (2) Sophia, daughter of Theodore II, marquess of Montferrat, and Joanna of Bar, then (3) Mara, daughter of Alexios IV, emperor of Trebizond, and Theodora Kantakouzene
Predecessor: Manuel II
Reign: 1425 – 1448
Brief: John became co-emperor with his father around the age of twenty-four. By the time he was thirty, he was in charge of the defenses of Constantinople as the city was besieged by Ottoman Sultan Murad II. In the hope that he could secure the protection of the city, he travelled to Italy and agreed to the union of the Orthodox and Catholic churches. While away, his father died and he became the sole ruler of Constantinople. John returned to Italy for the Council of Florence in 1439, but the proposed union of the churches failed due to opposition by the patriarchate of Constantinople. By good diplomacy with the Ottomans, John managed to save his city from complete conquest, but that would be achieved during the reign of his brother, Constantine XI, who had served as regent during John's travels and succeeded the emperor in 1448.
Brief: John became co-emperor with his father around the age of twenty-four. By the time he was thirty, he was in charge of the defenses of Constantinople as the city was besieged by Ottoman Sultan Murad II. In the hope that he could secure the protection of the city, he travelled to Italy and agreed to the union of the Orthodox and Catholic churches. While away, his father died and he became the sole ruler of Constantinople. John returned to Italy for the Council of Florence in 1439, but the proposed union of the churches failed due to opposition by the patriarchate of Constantinople. By good diplomacy with the Ottomans, John managed to save his city from complete conquest, but that would be achieved during the reign of his brother, Constantine XI, who had served as regent during John's travels and succeeded the emperor in 1448.
Date of Death: 31 October 1448
Successor: Constantine XI
Successor: Constantine XI
Other Monarchs Who Died Today:
- Cosimo III, grand duke of Tuscany (1723)
- Victor Amadeus II, duke of Savoy (1732)
- Eberhard IV Ludwig, duke of Württemberg (1733)
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