1580–1590
National Gallery of Art, 1947
National Gallery of Art, 1570
National Gallery of Art, 1939
National Gallery of Art, 1884
National Gallery of Art, 1938
National Gallery of Art, 1635
National Gallery of Art, 1936
National Gallery of Art, 1890
National Gallery of Art, 1966
National Gallery of Art, 1920
National Gallery of Art, 1969
National Gallery of Art, 1529
![Kopf (Head) [p. 54]](https://api.nga.gov/iiif/c3de8432-a066-47a1-8700-3a9a412a3fc7/full/843,/0/default.jpg)
![Figure 3 [trial proof]](https://api.nga.gov/iiif/bb244ffa-bedb-4287-b461-569de13cedb5/full/843,/0/default.jpg)
