1967
National Gallery of Art, 1920
National Gallery of Art, 1668
National Gallery of Art, 1987
National Gallery of Art, 1554
National Gallery of Art, 1983
National Gallery of Art, 1889
National Gallery of Art, 1602
National Gallery of Art, 1628
National Gallery of Art, 1470
National Gallery of Art, 1935
National Gallery of Art, 1936
National Gallery of Art, 1536
![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)
