Portrait of a Donor. Dated: c. 1470/1475. Dimensions: painted surface: 25.7 x 20.6 cm (10 1/8 x 8 1/8 in.) overall (panel): 27.2 x 22.2 cm (10 11/16 x 8 3/4 in.) framed: 43.5 x 38.1 x 6.9 cm (17 1/8 x 15 x 2 11/16 in.). Medium: oil on hardboard trans