1956
National Gallery of Art, 1938
National Gallery of Art, 1641
National Gallery of Art, 1462
National Gallery of Art, 1956
National Gallery of Art, 1972
National Gallery of Art, 1519
National Gallery of Art, 1893
National Gallery of Art, 1936
National Gallery of Art, 1438
National Gallery of Art, 1935
Frank, Robert, 1941
National Gallery of Art, 1529
![Mining Works on Monte Leone [reverse]](https://api.nga.gov/iiif/f3efd679-01c2-4694-97fc-5943efff2bfb/full/843,/0/default.jpg)
![The Altar of Faith on Mount Olympus [reverse]](https://api.nga.gov/iiif/d4a52e25-9986-4547-bd48-2e4060083eb9/full/843,/0/default.jpg)
![John VIII Palaeologus, 1392-1448, Emperor of Constantinople 1425 [obverse]](https://api.nga.gov/iiif/113c90d0-279b-4290-9a13-e38217e2724c/full/843,/0/default.jpg)
