The altarpiece with two pairs of wings is dedicated to the Virgin Mary, who features in all three positions of the altarpiece. The Altarpiece of the Virgin Mary of the Brotherhood of the Black Heads is attributed to the anonymous Master of the Legend of St. Lucy. The outer wings present the scene of the Annunciation, executed in the Grisaille technique, i.e. painted in shades of grey. The left wing depicts the Archangel Gabriel, holding a lily branch, the right one shows the Virgin Mary with an open book.