1967
National Gallery of Art, 1955
National Gallery of Art, 1922
National Gallery of Art, 1625
National Gallery of Art, 1938
National Gallery of Art, 1888
National Gallery of Art, 1400
National Gallery of Art, 1935
National Gallery of Art, 1940
National Gallery of Art, 1939
National Gallery of Art, 1963
National Gallery of Art, 1937
National Gallery of Art, 1969
![Ercole I d'Este, 1431-1505, 2nd Duke of Ferrara, Modena, and Reggio 1471 [obverse]](https://api.nga.gov/iiif/5cff686c-39d9-49f2-956a-fd3e82711f97/full/843,/0/default.jpg)
![Figure 6 [color trial proof]](https://api.nga.gov/iiif/57ec32d2-ee51-4dd0-b369-ee69e962bee7/full/843,/0/default.jpg)