Simone Martini, ‘Madonna and Child’, ca. 1326, The Metropolitan Museum of Art

painted surface 22 1/2 x 15 1/8 in. (57.2 x 38.4 cm)
http://www.metmuseum.org/art/collection/search/459136

About Simone Martini

Italian, ca. 1284 - 1344, Siena, Italy, based in Avignon, France