Fig. 1

The Adoration of the Mystic Lamb (Ghent Altarpiece), by Hubert and Jan van Eyck. Completed by 1432. Shown open, 375 × 514 cm. Upper register before restoration and lower register after restoration. (Cathedral of St Bavo, Ghent; ©KIKIRPA)

The Adoration of the Mystic Lamb (Ghent Altarpiece), by Hubert and Jan van Eyck. Completed by 1432. Shown open, 375 × 514 cm. Upper register before restoration and lower register after restoration. (Cathedral of St Bavo, Ghent; ©KIKIRPA)