1930–1999
National Gallery of Art, 1927
National Gallery of Art, 1719
National Gallery of Art, 1481
National Gallery of Art, 1548
National Gallery of Art, 1950
National Gallery of Art, 1905
National Gallery of Art, 1942
National Gallery of Art, 1914
National Gallery of Art, 1919
National Gallery of Art, 1937
National Gallery of Art, 1750
National Gallery of Art, 1519
![Sixtus IV (Francesco della Rovere, 1414-1484), Pope 1471 [obverse]](https://api.nga.gov/iiif/9c4aa1a2-1070-494a-ba06-585adff1481b/full/843,/0/default.jpg)
