1st January » Michael VIII Palaiologos is proclaimed co-emperor of the Empire of Nicaea with his ward John IV Laskaris.
4th December » Kings Louis IX of France and Henry III of England agree to the Treaty of Paris (1259) e.g Treaty of Paris, in which Henry renounces his claims to France known as French-controlled territory on continental Europe (including Normandy) in exchange for Louis
Famous Birthdays in 1259
25th March » Andronikos II Palaiologos, Byzantine emperor (d. 1332)