1884–1950
National Gallery of Art, 1861
National Gallery of Art, 1903
National Gallery of Art, 1981
National Gallery of Art, 1799
National Gallery of Art, 1884
National Gallery of Art, 1571
National Gallery of Art, 1964
National Gallery of Art, 1971
National Gallery of Art, 1935
National Gallery of Art, 1939
National Gallery of Art, 1658
National Gallery of Art, 1910
![Notizen und zwei Kreisformen (Notations with Two Circles) [p. 2]](https://api.nga.gov/iiif/4eadb77e-8dc6-4153-abb7-5a01967df1ac/full/843,/0/default.jpg)
![Papagei (A Parrot) [p. 19]](https://api.nga.gov/iiif/9f6dbd81-eda6-4815-bdc8-674fb1cc91a2/full/843,/0/default.jpg)
