Workshop of Simone Martini, ‘Saint Thaddeus’, probably c. 1320, National Gallery of Art, Washington, D.C.
painted surface: 26 x 19.7 cm (10 1/4 x 7 3/4 in.)  overall: 30.7 x 23.3 cm (12 1/16 x 9 3/16 in.)  framed: 44.4 x 60 cm (17 1/2 x 23 5/8 in.)