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 1258 Historical Events by Year 1260 Medieval Popes Gregory I Gregory XIII Julius II Julius III Leo X Pius V
Gregory I
Gregory XIII
Julius II
Julius III
Leo X
Pius V