Joseph I (Portuguese: José I; 6 June 1714 – 24 February 1777), "The Reformer" (Portuguese: "o Reformador"), was the King of Portugal and the Algarves from 31 July 1750 until his death. Among other activities, Joseph was devoted to hunting and the opera. Indeed, he assembled one of the greatest collections of operatic scores in Europe. Joseph was the third child of King John V of Portugal and his wife Maria Anna of Austria. Joseph had an older brother Pedro, an older sister Barbara and three younger brothers. At the death of his elder brother, who died at the age of two in 1714, Joseph became Prince of Brazil as the heir apparent of the king, and Duke of Braganza.

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