1804
National Gallery of Art, 1996
National Gallery of Art, 1894
National Gallery of Art, 1808
National Gallery of Art, 1645
National Gallery of Art, 1545
National Gallery of Art, 1797
National Gallery of Art, 1820
National Gallery of Art, 1936
National Gallery of Art, 1938
National Gallery of Art, 1646
National Gallery of Art, 1914
National Gallery of Art, 1859
![Umbria Verde [working proof 4]](https://api.nga.gov/iiif/4fe4bd15-3cc7-448d-850b-3bd9bda5b878/full/843,/0/default.jpg)
![Handstudien (Hands) [p. 62]](https://api.nga.gov/iiif/9f5514f7-7b6e-465c-865b-d6a2b5c1fff5/full/843,/0/default.jpg)
