The Crucifixion Altarpiece: The Mass of St. Gregory (Reverse of Left Wing)
The back of the left wing of the three-part Crucifixion Altarpiece shows a clergyman in an interior kneeling before Christ with a book and golden chalice on the white altar table in front of him. He is wearing a richly decorated vestment and is accompanied by two other male figures dressed in the same vestment. Another kneeling figure holds a tall candle upright which reaches up to a group of angels floating above. Just below the angels on the right there appears to be a deep scorch mark burnt into the panel.