1948
National Gallery of Art, 1890
National Gallery of Art, 1965
National Gallery of Art, 1935
National Gallery of Art, 1799
National Gallery of Art, 1921
National Gallery of Art, 1914
National Gallery of Art, 1936
National Gallery of Art, 1481
National Gallery of Art, 1699
National Gallery of Art, 1997
National Gallery of Art, 1826
National Gallery of Art, 1576
![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)
![Green Angel 2 [1st element in black proof]](https://api.nga.gov/iiif/5285a59a-d180-4c0b-89ba-82e122c1f4e1/full/843,/0/default.jpg)
