1258 Calendar
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Historical Event(s)
February 10, 1258
– Baghdad falls to the Mongols, and the Abbasid Caliphate is destroyed.
August 25, 1258
– Regent George Mouzalon and his brothers are killed during a coup headed by the aristocratic faction under, paving the way for its leader, Michael VIII Palaiologos, to ultimately usurp the throne of the Empire of Nicaea.