1490
National Gallery of Art, 1936
National Gallery of Art, 1938
National Gallery of Art, 1835
Rosenwald, Lessing Julius, 1631
National Gallery of Art, 1633
National Gallery of Art, 1780
National Gallery of Art, 1896
National Gallery of Art, 1905
Rosenwald, Lessing Julius, 1887
![The Mass of Saint Gregory [recto]](https://api.nga.gov/iiif/4d23fcb3-6c20-4387-b54f-a89d717bd134/full/843,/0/default.jpg)
