1634–1705
National Gallery of Art, 1861
National Gallery of Art, 1763
National Gallery of Art, 1927
National Gallery of Art, 1547
National Gallery of Art, 1935
National Gallery of Art, 1941
National Gallery of Art, 1974
National Gallery of Art, 1956
National Gallery of Art, 1890
National Gallery of Art, 1940
National Gallery of Art, 1779
National Gallery of Art, 1836
![Dünenlandschaft, Farbangaben (Sketch with Notations) [p. 7]](https://api.nga.gov/iiif/732ff8b3-bd07-4d61-bf6c-2a597ecb776e/full/843,/0/default.jpg)
![Citadel of Piacenza [reverse]](https://api.nga.gov/iiif/46df1860-ba58-47e7-9ff4-57a20fe77ca5/full/843,/0/default.jpg)
