Niccolò di Buonaccorso, ‘The Coronation of the Virgin’, ca. 1380, The Metropolitan Museum of Art

painted surface 17 5/8 x 10 1/2 in. (44.8 x 26.7 cm)
http://www.metmuseum.org/art/collection/search/458961

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

About Niccolò di Buonaccorso

Italian, died 1388, based in Siena, Italy