1993–1994
National Gallery of Art, 1968
National Gallery of Art, 1954
National Gallery of Art, 1937
National Gallery of Art, 1756
National Gallery of Art, 1938
National Gallery of Art, 1920
National Gallery of Art, 1884
National Gallery of Art, 1939
National Gallery of Art, 1935
National Gallery of Art, 1988
National Gallery of Art, 1500
![Singende Frau (Woman Singing) [p. 7]](https://api.nga.gov/iiif/4a937783-6d29-46f1-bbaa-55e199414827/full/843,/0/default.jpg)
![Detail eines Bärenkopfes (Detail of a Bear's Head) [p. 56]](https://api.nga.gov/iiif/678ce5b3-e255-4560-896b-6a5750ff9b04/full/843,/0/default.jpg)
![Room [working proof 14]](https://api.nga.gov/iiif/56dd121c-65c9-47ff-947b-a530ddf67f0b/full/843,/0/default.jpg)
![A Monk [verso]](https://api.nga.gov/iiif/5174d6aa-be55-4904-aaf3-5afba58e22d5/full/843,/0/default.jpg)