Britain's Lost Masterpieces is a factual BBC Four documentary television series that aims to uncover overlooked art treasures in British public collections, in conjunction with Art UK. It is presented by Bendor Grosvenor, along with art historian Jacky Klein and Emma Dabiri. The series also features the art restoration work of Simon Gillespie. In North American syndication, the series is called The Art Detectives.

Joos van Cleve was a leading painter active in Antwerp from his arrival there around 1511 until his death in 1540 or 1541. Within Dutch and Flemish Renaissance painting, he combines the traditional techniques of Early Netherlandish painting with influences of more contemporary Renaissance painting styles.