Portrait of a man, bust-length, with a white beard and turban, wearing a gold chain

This colorful portrait of a man in a turban had been attributed for the most of the last century to Salomon Koninck, an Amsterdam artist known for painting portraits in the style of Rembrandt. In 1990, Professor Werner Sumowski convincingly reattributed the portrait to Isaac Jouderville, an artist associated with Rembrandt's final years in Leiden and first years in Amsterdam. Jouderville has the distinction of being one of Rembrandt's best documented pupils. His guardian paid Rembrandt an annual fee of 100 guilders for a two-year apprenticeship that Jouderville completed in November 1631. At that time, some art historians propose, that Jouderville followed Rembrandt to Amsterdam and worked as an active assistant to the master.