1651
National Gallery of Art, 1554
National Gallery of Art, 1935
National Gallery of Art, 1957
National Gallery of Art, 1475
National Gallery of Art, 1923
National Gallery of Art, 1941
National Gallery of Art, 1509
National Gallery of Art, 1553
National Gallery of Art, 1936
National Gallery of Art, 1590
National Gallery of Art, 1627
National Gallery of Art, 1984
![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)
