1799
National Gallery of Art, 1595
National Gallery of Art, 1400
National Gallery of Art, 1497
National Gallery of Art, 1930
National Gallery of Art, 1550
National Gallery of Art, 1598
National Gallery of Art, 1544
National Gallery of Art, 1924
National Gallery of Art, 1936
National Gallery of Art, 1919
National Gallery of Art, 1884
National Gallery of Art, 1761
![Della Rovere Shield, Crossed Keys, and Tiara [reverse]](https://api.nga.gov/iiif/12c6529d-7ec1-4f9d-9071-dab2cb80f26a/full/843,/0/default.jpg)
![Study of Artillery Cannon (Begonnene Studie einer Artilleriekanone) [p. 1]](https://api.nga.gov/iiif/a79e6db5-9389-4615-90eb-e66fdb402987/full/843,/0/default.jpg)
