1923–1924
National Gallery of Art, 1582
National Gallery of Art, 1951
National Gallery of Art, 1967
National Gallery of Art, 1982
National Gallery of Art, 1592
National Gallery of Art, 1955
National Gallery of Art, 1830
National Gallery of Art, 1849
National Gallery of Art, 1937
National Gallery of Art, 1936
National Gallery of Art, 1956
National Gallery of Art, 1472
![Gregory XIII (Ugo Buoncompagni, 1502-1585), Pope 1572 [obverse]](https://api.nga.gov/iiif/bd43eb67-17a8-4183-8dc4-1aaa57051578/full/843,/0/default.jpg)
![Archetypa studiaque patris Georgii Hoefnagelii [Part 4, Plate 3]](https://api.nga.gov/iiif/8331f512-f797-462c-94c7-8ec7a9288e52/full/843,/0/default.jpg)
![Untitled [portrait]](https://api.nga.gov/iiif/fc4a20b8-1d3b-40a1-9423-5cdc88c3b964/full/843,/0/default.jpg)
