1857
National Gallery of Art, 1976
National Gallery of Art, 1809
National Gallery of Art, 1939
National Gallery of Art, 1887
National Gallery of Art, 1816
National Gallery of Art, 1482
National Gallery of Art, 1626
National Gallery of Art, 1536
National Gallery of Art, 1849
National Gallery of Art, 1935
![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)
![Figure 4 [trial proof 8]](https://api.nga.gov/iiif/12e9355d-8cb4-48ba-9209-9def12f9e068/full/843,/0/default.jpg)
