However, his star subsequently waned until the early 20th century, when experts and connoisseurs began to re-evaluate his significance. De Beer’s known oeuvre now comprises about 40 works, principally devotional paintings and triptychs, but also drawings and a stained-glass window.

This exhibition – the latest in the Barber’s ‘Masterpiece in Focus’ series – focuses on the Barber’s own double-sided altarpiece featuring The Nativity and the Apocryphal tale of Joseph and the Suitors, and brings together for the first time all his paintings and drawings from public and private collections in Britain.