Alfonso III, called the Liberal (el Liberal) or the Free, was the King of Aragon and Count of Barcelona (as Alfons II) from 1285. He conquered the Kingdom of Majorca between his succession and 1287.
He was a son of Peter III of Aragon and his Queen consort Constantia of Sicily, daughter and heiress of Manfred of Sicily. His maternal grandmother Beatrice of Savoy was a daughter of Amadeus IV of Savoy and Anne of Burgundy.
Soon after assuming the throne, he conducted a campaign to reincorperate the Balearic Islands into the Kingdom of Aragon - which had been lost due to the division of the kingdom by his grandfather, James I of Aragon. Thus in 1285 he declared war on his uncle, James I of Majorca, and conquered both Majorca (1285) and Ibiza (1286), effectively reassuming suzerainty over the Kingdom of Majorca. The notable high point of his rule saw the capture of Minorca from the Caliphate of Córdoba on 17 January 1287 - that date now serving as Minorca's national holiday.