Master of the Osservanza Triptych, ‘Saint Anthony the Abbot in the Wilderness’, ca. 1435, The Metropolitan Museum of Art

painted surface 18 1/2 x 13 1/4 in. (47 x 33.7 cm)
http://www.metmuseum.org/art/collection/search/458967

Image rights: The Metropolitan Museum of Art (Robert Lehman Collection, 1975), licensed under CC0 1.0 Universal

About Master of the Osservanza Triptych