List of 1258 Major News Events in History, Most Important Historical Events in 1258
| Date | Event |
|---|---|
| February 10, 1258 | Mongol invasions: Baghdad falls to the Mongols, bringing the Islamic Golden Age to an end. |
| June 25, 1258 | War of Saint Sabas: In the Battle of Acre, the Venetians defeat a larger Genoese fleet sailing to relieve Acre. |
| August 25, 1258 | Regent George Mouzalon and his brothers are killed during a coup headed by the aristocratic faction under Michael VIII Palaiologos, paving the way for its leader to ultimately usurp the throne of the Empire of Nicaea. |