1957
Rosenwald, Lessing Julius, 1538
Rosenwald, Lessing Julius, 1904
National Gallery of Art, 1969
National Gallery of Art, 1825
National Gallery of Art, 1966
Rosenwald, Lessing Julius, 1513
National Gallery of Art, 1482
National Gallery of Art, 1963
National Gallery of Art, 1617
National Gallery of Art, 1940
National Gallery of Art, 1998
National Gallery of Art, 1925
![Sixtus IV (Francesco della Rovere, 1414-1481), Pope 1471 [obverse]](https://api.nga.gov/iiif/8fc57e11-7b1e-4949-9c03-6a12d20cd606/full/843,/0/default.jpg)
![Pinion [working proof]](https://api.nga.gov/iiif/00060b68-8f21-47e2-9d59-ac8713a74399/full/843,/0/default.jpg)
