Treaty of Anagni in the context of Peter III of Aragón

The Peace of Caltabellotta, signed on 31 August 1302, was the last of a series of treaties, including those of Tarascon and Anagni, designed to end the War of the Sicilian Vespers between the Houses of Anjou and Barcelona for ascendancy in the Mediterranean and especially Sicily and the Mezzogiorno.

The peace divided the old Kingdom of Sicily into an island portion and a peninsular portion. The island, called the Kingdom of Trinacria, went to Frederick III, who had been ruling it; the Mezzogiorno, called the Kingdom of Sicily contemporaneously but the Kingdom of Naples by modern scholarship, went to Charles II, who had been ruling it. Thus, the peace was formal recognition of an uneasy status quo.

The Kingdom of Majorca (1231–1715) was created by James I of Aragon following his conquest in 1229 and the subsequent surrender of sovereignty by the Muslim rulers of the Balearic Islands in 1231. It was ruled in conjunction with the Crown of Aragon until his death when by will it passed to a younger son, James (II), who ruled the kingdom as nominal vassal of the Aragonese Crown. He was removed by his nephew Alfonso III of Aragon, who conquered the island of Menorca in 1287, effectively recovered Menorca from Moorish rule. By the Treaty of Anagni of 1295, however, these island territories were yielded back to James. In 1344, the kingdom was again united with the Crown of Aragon but still disputed by pretenders until 1403. It subsequently formed an administrative kingdom within the Crown of Spain periodically included in the royal style – as in Philip II's in the 1584 Treaty of Joinville – until the Nueva Planta Decrees abolished these divisions in 1715.