X-radiograph(s) of "Male Portrait"

X-Radiograph Description: Negative Burroughs Number: 369 X-Radiograph(s) of: Artist: Castagno, Andrea del, Italian, 1421-1457 Artist: Also att. to Pollaiolo, Antonio del, Italian, 1431/2-1498 Title: Male Portrait Owner: National Gallery (JP Morgan Collection), Washington, DC