What Happened in 1259
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- Jan 1 Michael VIII Palaiologos is proclaimed co-emperor of the Empire of Nicaea with his ward John IV Laskaris
- Dec 4 Treaty of Paris: English King Henry III and French King Louis IX end 100 years of conflict between the Capetian and Plantagenet dynasties
- Mar 25 Andronikos II Palaiologos, Byzantine emperor (d. 1332)
- May 29 Christopher I, King of Denmark (1252-59), dies at about 40 (b. 1219)
- Sep 27 Ezzeline III da Romano, Italian ruler of Verona, Vicenza and Padua (considered a "cruel monster"), dies at about 65
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List of Years
Gregory I
Gregory XIII
Julius II
Julius III
Leo X
Pius V