Oost, Jacob van (yäˈkōp vän ōst) [key], the elder, 1601–71, Flemish portrait and religious painter, b. Bruges. He spent most of his life in Bruges, with the exception of several years in Rome, where he was a pupil of Annibale Carracci. A follower also of Rubens and Caravaggio, he developed a vigorous and realistic style. There are various pictures by van Oost in the churches of Bruges; Resurrection and Descent from the Cross are in the cathedral. His son and pupil, Jacob van Oost, the younger, 1637–1713, settled in Lille, where he continued his father's tradition. Much of his work remains in the churches and museums of that city.