1865–1875
National Gallery of Art, 1910
National Gallery of Art, 1916
National Gallery of Art, 1889
National Gallery of Art, 1936
National Gallery of Art, 1840
National Gallery of Art, 1970
National Gallery of Art, 1567
National Gallery of Art, 1722
National Gallery of Art, 1472
National Gallery of Art, 2003
National Gallery of Art, 1770
National Gallery of Art, 1978
![Cosimo I de' Medici, 1519-1574, Duke of Florence 1537 [obverse]](https://api.nga.gov/iiif/e47168a7-b573-42a4-8db1-378f2f994d5e/full/843,/0/default.jpg)
![Ercole I d'Este, 1431-1505, Duke of Ferrara, Modena, and Reggio 1471 [obverse]](https://api.nga.gov/iiif/e36de80b-e494-4c81-adfd-dfaef8b04dbb/full/843,/0/default.jpg)
