1797
National Gallery of Art, 1640
National Gallery of Art, 1975
National Gallery of Art, 1955
National Gallery of Art, 1964
National Gallery of Art, 1554
National Gallery of Art, 1981
National Gallery of Art, 1783
National Gallery of Art, 1896
National Gallery of Art, 1995
Corcoran Gallery of Art, 1866
National Gallery of Art, 1778
![Ercole II d'Este, 1508-1559, 4th Duke of Ferrara 1534 [obverse]](https://api.nga.gov/iiif/0be44745-b086-4642-afb2-b8de5f4cd0bc/full/843,/0/default.jpg)
![Untitled (Orange Mezzotint) [trial proof C]](https://api.nga.gov/iiif/b521b946-582a-4f90-aab2-1a1e62e480cf/full/843,/0/default.jpg)
