1917
National Gallery of Art, 1465
Rosenwald, Lessing Julius, 1630
National Gallery of Art, 1936
National Gallery of Art, 1618
Rosenwald, Lessing Julius, 1520
National Gallery of Art, 1643
Rosenwald, Lessing Julius, 1915
National Gallery of Art, 1890
National Gallery of Art, 1941
National Gallery of Art, 1490
National Gallery of Art, 1939
![The Mass of Saint Gregory [recto]](https://api.nga.gov/iiif/4d23fcb3-6c20-4387-b54f-a89d717bd134/full/843,/0/default.jpg)
