1988
Patrons' Permanent Fund, 1997
Patrons' Permanent Fund, 1623
Patrons' Permanent Fund, 1969
Patrons' Permanent Fund, 1994
Patrons' Permanent Fund, 2003
Bernd and Hilla Becher, 1988
Patrons' Permanent Fund, 1862
Patrons' Permanent Fund, 1926
Patrons' Permanent Fund, 1928
Michael Cohen, 1986
Patrons' Permanent Fund, 1945
![Green Angel 2 [trial proof 17]](https://api.nga.gov/iiif/97f09613-c958-4955-ad1c-48fb113eb4a2/full/843,/0/default.jpg)
![Figure 1 [color trial proof]](https://api.nga.gov/iiif/12239379-e928-4fb3-b6fb-5c8d18956f8a/full/843,/0/default.jpg)
![Untitled [trial proof G]](https://api.nga.gov/iiif/4daedf10-2d54-44f9-b3e1-6c25c8d786ae/full/843,/0/default.jpg)
![Untitled [trial proof]](https://api.nga.gov/iiif/b1db08c8-31dc-422c-8be8-ce374f6151ca/full/843,/0/default.jpg)
