Petrus Christus, ‘Portrait of a Carthusian’, 1446, The Metropolitan Museum of Art

painted surface 11 1/2 x 7 3/8 in. (29.2 x 18.7 cm)
http://www.metmuseum.org/art/collection/search/435896

Image rights: The Metropolitan Museum of Art (The Jules Bache Collection, 1949), licensed under CC0 1.0 Universal

About Petrus Christus

Netherlandish, 1410-1475, Baarle-Hertog, Belgium, based in Brügge, Germany