1848
National Gallery of Art, 1917
Rosenwald, Lessing Julius, 1891
National Gallery of Art, 1931
National Gallery of Art, 1490
National Gallery of Art, 1937
National Gallery of Art, 1626
National Gallery of Art, 1915
National Gallery of Art, 1936
National Gallery of Art, 1905
Rosenwald, Lessing Julius, 1681
National Gallery of Art, 1521
![The Mass of Saint Gregory [recto]](https://api.nga.gov/iiif/4d23fcb3-6c20-4387-b54f-a89d717bd134/full/843,/0/default.jpg)
