The Angel of the Annunciation, Simone Martini, circa 1330

Date: circa 1330. Dimensions: painted surface (on recto): 29.5 x 20.5 cm (11 5/8 x 8 1/16 in.); overall: 31 x 21.5 cm (12 3/16 x 8 7/16 in.); painted surface (gesso ground on verso): 21 x 30.2 cm (8 1/4 x 11 7/8 in.); ; framed: 54.6 x 32.9 x 4.1 cm (21 1/2 x 12 15/16 x 1 5/8 in.). Medium: tempera on poplar panel. Collection: National Gallery of Art. Simone Martini, The Angel of the Annunciation, c. 1330, NGA 357