1999
National Gallery of Art, 1973
National Gallery of Art, 1858
National Gallery of Art, 1903
National Gallery of Art, 1948
National Gallery of Art, 2015
National Gallery of Art, 1986
National Gallery of Art, 1935
National Gallery of Art, 1961
National Gallery of Art, 1932
National Gallery of Art, 1387
National Gallery of Art, 1475
National Gallery of Art, 1924
![Four Panels from Untitled 1972 [C panel, trial proof 5]](https://api.nga.gov/iiif/3b3f0ca3-37fd-4885-a4b7-78a02265e09f/full/843,/0/default.jpg)
![Gothic Vault [verso]](https://api.nga.gov/iiif/5df95635-8cdc-4a17-8faa-d9568758083b/full/843,/0/default.jpg)
