Attributed to Martino di Bartolomeo di Biagio, ‘Madonna and Child with Saint Peter and Saint Stephen [right panel]’, ca. 1400, National Gallery of Art, Washington, D.C.
overall size (with added strips): 169 x 54.6 x 3.5 cm (66 9/16 x 21 1/2 x 1 3/8 in.)  original panel: 130 x 43.8 x 3.5 cm (51 3/16 x 17 1/4 x 1 3/8 in.)  painted surface: 93.4 x 43.8 cm (36 3/4 x 17 1/4 in.)