Diego Duarte or Jacob Duarte (1612–1691) was a 17th-century Portuguese jeweler, banker, composer, organist and art collector living in Antwerp, who owned paintings by Jan Vermeer, Raphael and others. Duarte was born in Antwerp, the son of , a Christian diamond and art dealer of Jewish descent in Antwerp, who was befriended with e.g. Constantijn Huygens. Gaspar was the son of Diego Duarte I, and was born in 1584 in Antwerp. He later became the consul of Portugal in Antwerp. In 1635, Diego was appointed "jeweller in ordinary" by Charles I of England, but he returned to Antwerp in 1642. He received a part of the art collection of his father on his death in 1653, and continued collecting throughout his life. Part of his collection was sold in Amsterdam in 1682. Diego had a long correspondence