1965–1975
National Gallery of Art, 1962
National Gallery of Art, 1947
National Gallery of Art, 1880
National Gallery of Art, 1461
National Gallery of Art, 1955
National Gallery of Art, 1973
National Gallery of Art, 1626
National Gallery of Art, 1380
National Gallery of Art, 1935
National Gallery of Art, 1939
![Four Panels from Untitled 1972 [D panel, trial proof 29]](https://api.nga.gov/iiif/007d3fc2-8ef6-4724-b755-54be589b9761/full/843,/0/default.jpg)
![Madonna of Humility, The Blessing Christ, Two Angels, and a Donor [obverse]](https://api.nga.gov/iiif/f38ca59b-b629-4268-bf64-f5d089c8cf06/full/843,/0/default.jpg)
