Editing 1257 (section)

==== Levant ====
* [[Venetian–Genoese Wars]]: The Venetian fleet under Admiral [[Lorenzo Tiepolo]] breaks through the harbour chain at [[Acre, Israel|Acre]] and destroys several Genoese ships. He also attacks the fortifications but Tiepolo is unable to expel the Genoese garrison (some 800 men strong and armed with 50–60 [[ballista]]e), from their quarter of the city throwing up a blockade.<ref name=Runciman3>[[Steven Runciman]] (1952). ''A History of The Crusades. Vol III: Kingdom of Acre'', pp. 238, 252. {{ISBN|978-0-241-29877-0}}.</ref>
* [[April 10]] &ndash; [[Aybak|Izz al-Din Aybak]], Mamluk sultan of [[Egypt in the Middle Ages|Egypt]], is murdered on orders of his wife, [[Shajar al-Durr]]. He is succeeded by his 14-year-old son, [[Al-Mansur Ali|Nur al-Din Ali]], as ruler of the [[Mamluk Sultanate]] (until [[1259]]).