1525–1574
National Gallery of Art, 1890
Kress Foundation, Samuel H., 1525
National Gallery of Art, 1976
National Gallery of Art, 1635
National Gallery of Art, 1611
National Gallery of Art, 1956
National Gallery of Art, 1836
National Gallery of Art, 1987
National Gallery of Art, 1861
National Gallery of Art, 1452
National Gallery of Art, 1950
National Gallery of Art, 1938
![Girolamo Panico, died 1558, and Pompeo Ludovisi, died 1565 [obverse]](https://api.nga.gov/iiif/1077f9f4-3c12-4757-8034-052d585611b2/full/843,/0/default.jpg)
![#6 (after 'Untitled 1975') [progressive proof 7]](https://api.nga.gov/iiif/56d1a753-cb67-48a9-8d12-cc33873c0a96/full/843,/0/default.jpg)
![Study for "Mantis" [recto]](https://api.nga.gov/iiif/9c0c8736-f818-4126-b2eb-4ed3ff8d1ac5/full/843,/0/default.jpg)
