1526
National Gallery of Art, 1958
National Gallery of Art, 1875
National Gallery of Art, 1959
National Gallery of Art, 1613
National Gallery of Art, 1456
Duveen Brothers, Inc., 1533
National Gallery of Art, 1968
National Gallery of Art, 1657
Duveen Brothers, Inc., 1480
National Gallery of Art, 1925
National Gallery of Art, 1951
National Gallery of Art, 1867
![Book, Skull, Bones, and Rider in Landscape [reverse]](https://api.nga.gov/iiif/25d713c5-b9fa-42ab-8e4e-5d9fadd4caf2/full/843,/0/default.jpg)
![Francesco I Sforza, 1401-1466, 4th Duke of Milan 1450 [obverse]](https://api.nga.gov/iiif/f25ed8ee-67a1-4e33-b136-160f6e2484e1/full/843,/0/default.jpg)
![Andrea Gritti, 1455-1538, Doge of Venice 1523 [obverse]](https://api.nga.gov/iiif/b15fc124-6a08-4429-abc7-a8e31c403ca4/full/843,/0/default.jpg)
![Giovanni Francesco Marascha [obverse]](https://api.nga.gov/iiif/74d448ad-a0c5-4691-8631-0f017489f003/full/843,/0/default.jpg)
