1744–1750
National Gallery of Art, 1923
National Gallery of Art, 1800
National Gallery of Art, 1939
National Gallery of Art, 1925
National Gallery of Art, 1972
National Gallery of Art, 1906
National Gallery of Art, 1790
National Gallery of Art, 1560
National Gallery of Art, 1719
National Gallery of Art, 1937
National Gallery of Art, 1884
National Gallery of Art, 1619
![Nilpferdkopf (Hippo Head) [p. 16]](https://api.nga.gov/iiif/12c0bf1e-a1fe-433a-987e-d228bedf2807/full/843,/0/default.jpg)
