2000
National Gallery of Art, 1931
National Gallery of Art, 1978
National Gallery of Art, 1920
National Gallery of Art, 1935
National Gallery of Art, 1560
National Gallery of Art, 1856
National Gallery of Art, 1936
National Gallery of Art, 1949
National Gallery of Art, 2006
National Gallery of Art, 1947
National Gallery of Art, 1976
National Gallery of Art, 1455
![Cantilever Bridges [working proof 6]](https://api.nga.gov/iiif/6e88f1b8-94aa-4f69-892b-3fea2a0b9303/full/843,/0/default.jpg)
![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)