1510
Rosenwald, Lessing Julius, 1909
National Gallery of Art, 1941
Rosenwald, Lessing Julius, 1490
Rosenwald, Lessing Julius, 1748
National Gallery of Art, 1513
National Gallery of Art, 1935
Rosenwald, Lessing Julius, 1779
Rosenwald, Lessing Julius, 1620
National Gallery of Art, 1490
Rosenwald, Lessing Julius, 1450
National Gallery of Art, 1465
National Gallery of Art, 1917
![The Mass of Saint Gregory [recto]](https://api.nga.gov/iiif/4d23fcb3-6c20-4387-b54f-a89d717bd134/full/843,/0/default.jpg)
