1613
National Gallery of Art, 1651
National Gallery of Art, 1979
National Gallery of Art, 1665
National Gallery of Art, 1903
Bruce Fund, Ailsa Mellon, 1796
National Gallery of Art, 1820
Tunick, Inc., David, 1550
National Gallery of Art, 1400
National Gallery of Art, 1968
National Gallery of Art, 1460
![Room [special proof]](https://api.nga.gov/iiif/3e026106-9c25-493e-995f-89f077bfc8a9/full/843,/0/default.jpg)
![Sixtus IV (Francesco della Rovere, 1414-1484), Pope 1471 [obverse]](https://api.nga.gov/iiif/3a538c6d-adea-420f-bbcc-b241c54384a3/full/843,/0/default.jpg)
