1546
National Gallery of Art, 1900
National Gallery of Art, 1937
Rosenwald, Lessing Julius, 1569
Rosenwald, Lessing Julius, 1521
National Gallery of Art, 1837
National Gallery of Art, 1509
National Gallery of Art, 1466
Rosenwald, Lessing Julius, 1920
National Gallery of Art, 1938
National Gallery of Art, 1936
National Gallery of Art, 1939
National Gallery of Art, 1490
![The Mass of Saint Gregory [recto]](https://api.nga.gov/iiif/4d23fcb3-6c20-4387-b54f-a89d717bd134/full/843,/0/default.jpg)