Peter III of Aragon

Peter III the Great (c. 1240–1285), son of James I and Yolande of Hungary, ruled as King of Aragon and Count of Barcelona from 1276. In 1280 he defeated a Catalan noble revolt.

After the Sicilian Vespers uprising in 1282, he invaded Sicily on the Hohenstaufen claim of his wife Constance II, drove out Charles I of Anjou and was crowned king of the island. In 1283 he was forced to grant the General Privilege to the Aragonese Union.

Pope Martin IV thereupon proclaimed an Aragonese Crusade, and the French invasion of Catalonia in 1285 collapsed by land and sea. Peter died in 1285.