‘Palatial Mantelpiece with Mercury and Hope [recto]’, 1571, National Gallery of Art, Washington, D.C.
Overall (folded): 31.2 x 20.3 cm (12 5/16 x 8 in.)  overall (unfolded): 31.2 x 41.1 cm (12 5/16 x 16 3/16 in.)