What Day of the Week
1258 Calendar
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1258 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.