1827–1837
National Gallery of Art, 1941
National Gallery of Art, 1937
National Gallery of Art, 1978
National Gallery of Art, 1731
National Gallery of Art, 1988
National Gallery of Art, 1973
National Gallery of Art, 1620
National Gallery of Art, 1895
National Gallery of Art, 1560
National Gallery of Art, 1634
National Gallery of Art, 1942
![Pi [working proof 2]](https://api.nga.gov/iiif/cd9ef14b-ffc9-4b54-8bff-f34993de222f/full/843,/0/default.jpg)
