Peter III

(born 1239—died Nov. 11, 1285, Villafrance del Panades, Catalonia) King of Aragon (1276–85) and of Sicily (as Pedro I, 1282–85). He married the Hohenstaufen heiress of Sicily (1262) and ended the Sicilian revolt (1282), becoming king despite Guelph and papal opposition (see Sicilian Vespers). Unhappy with his Sicilian venture, nobles and municipalities in Aragon forced Peter to confirm their legal rights and to diminish crown rights. In 1285 he defeated Philip III of France, who had invaded Aragon in an effort to dethrone him.

Source: Encyclopedia Britannica