X-radiograph(s) of "Madonna and Child (terracotta relief)"

X-Radiograph Description: X-Radiograph X-Radiograph Settings: 5 ma, 90 kv, 3 min (good); 5 ma, 80 kv, 2 1/2 min. (good); 5 ma, 95 kv, 3 1/2 min. (upper half: excellent); 5 ma, 95 kv, 3 1/2 min. (lower half: excellent); 5 ma, 80 kv, 2 min. (lower half: excellent); 5 ma, 80 kv, 2 min. (upper half: excellent) Burroughs Number: 4198 X-Radiograph(s) of: Artist: Della Quercia, Jacopo, Italian, ca.1372-1438 Artist: Or Circle of Lorenzo Ghiberti Title: Madonna and Child (terracotta relief) Date: 15th century Owner: Harvard University Art Museums Object Number: 1964.113