1931–1934
National Gallery of Art, 1760
National Gallery of Art, 1596
National Gallery of Art, 1810
National Gallery of Art, 1967
National Gallery of Art, 1635
National Gallery of Art, 1903
Bruce Fund, Ailsa Mellon, 1678
National Gallery of Art, 1913
National Gallery of Art, 1582
National Gallery of Art, 1500
Bruce Fund, Ailsa Mellon, 1870
National Gallery of Art, 1510
![Gregory XIII (Ugo Buoncompagni, 1502-1585), Pope 1572 [obverse]](https://api.nga.gov/iiif/bd43eb67-17a8-4183-8dc4-1aaa57051578/full/843,/0/default.jpg)
