Francesco del Cossa, ‘The Crucifixion’, ca. 1473/1474, National Gallery of Art, Washington, D.C.
overall (diameter of painted surface): 60 x 63.2 cm (23 5/8 x 24 7/8 in.)  framed: 102.9 x 102.2 x 8.9 cm (40 1/2 x 40 1/4 x 3 1/2 in.)