X-radiograph(s) of "Portrait of a Man"

X-Radiograph Description: X-Radiograph, Negative Burroughs Number: 421 X-Radiograph(s) of: Artist: Colantonio, Niccolo Antonio (?), Italian, ca.1420-after 1460 Artist: Or Joos van Gent, Netherlandish, active 1460-1475 Title: Portrait of a Man Owner: Cleveland Museum, OH Object Number: 1916.811