1525–1574
National Gallery of Art, 1830
National Gallery of Art, 1895
National Gallery of Art, 1875
National Gallery of Art, 1832
National Gallery of Art, 1958
National Gallery of Art, 1847
National Gallery of Art, 1590
National Gallery of Art, 1887
Duveen Brothers, Inc., 1561
National Gallery of Art, 1935
National Gallery of Art, 1955
![Mars Resting on a Spear and Shield [reverse]](https://api.nga.gov/iiif/ed5302ad-fa7c-47fb-9b15-8100a890e80b/full/843,/0/default.jpg)
![The Porta Pia, Rome [reverse]](https://api.nga.gov/iiif/20de311d-df5d-4439-b57e-797b147357a3/full/843,/0/default.jpg)
