1958
Rosenwald, Lessing Julius, 1490
National Gallery of Art, 1980
Rosenwald, Lessing Julius, 1470
National Gallery of Art, 1955
National Gallery of Art, 1990
National Gallery of Art, 1884
Rosenwald, Lessing Julius, 1923
National Gallery of Art, 1962
National Gallery of Art, 1647
National Gallery of Art, 1624
National Gallery of Art, 1820
Rosenwald, Lessing Julius, 1642
![The Mass of Saint Gregory [recto]](https://api.nga.gov/iiif/4d23fcb3-6c20-4387-b54f-a89d717bd134/full/843,/0/default.jpg)
![Begonnener Pferdekopf (Beginning Sketch of Horse Head) [p. 7]](https://api.nga.gov/iiif/3a3bbb04-5daa-4f15-9d62-f84a4a7627c6/full/843,/0/default.jpg)
