1615
National Gallery of Art, 1969
National Gallery of Art, 1935
National Gallery of Art, 1962
National Gallery of Art, 1803
National Gallery of Art, 1455
National Gallery of Art, 1891
National Gallery of Art, 1837
National Gallery of Art, 1987
National Gallery of Art, 1832
National Gallery of Art, 1971
![Pietro Barbo, 1417-1471 (Pope Paul II, 1464), as Cardinal of San Marco [obverse]](https://api.nga.gov/iiif/e5d95fda-6fc2-480a-9e80-3e06c39c507b/full/843,/0/default.jpg)
![Painting with Two Balls [trial proof]](https://api.nga.gov/iiif/9c98bbf4-72b4-4abe-bbad-949aae2eabf5/full/843,/0/default.jpg)