1997
National Gallery of Art, 1968
National Gallery of Art, 1900
National Gallery of Art, 1482
National Gallery of Art, 1937
National Gallery of Art, 1972
National Gallery of Art, 1935
National Gallery of Art, 1400
National Gallery of Art, 1852
Vogel, Herbert, Mr. and Mrs., 1968
National Gallery of Art, 1977
Vogel, Herbert, Mr. and Mrs., 1972
![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)
