State Museum of Berlin, https://creativecommons.org/publicdomain/mark/1.0/
Public Domain
Yale Center for British Art
Public Domain
The National Heritage Institute, dating 1915, Creative Commons (CC BY-SA 4.0) https://creativecommons.org/licenses/by-sa/4.0/, Digitally Enhanced.
Berlin State Museums, Art Library, Mark 1.0, https://creativecommons.org/publicdomain/mark/1.0/, Public Domain.
The National Heritage Institute, dating 1915, Creative Commons (CC BY-SA 4.0) https://creativecommons.org/licenses/by-sa/4.0/, Digitally Enhanced.
Berlin State Museums, National Gallery, Mark 1.0, https://creativecommons.org/publicdomain/mark/1.0/, Public Domain.
The National Heritage Institute, dating 1947, Creative Commons (CC BY-SA 4.0) https://creativecommons.org/licenses/by-sa/4.0/, Digitally Enhanced.
The National Heritage Institute, Creative Commons (CC BY-SA 4.0) https://creativecommons.org/licenses/by-sa/4.0/, Digitally Enhanced.
Berlin State Museums, Art Library, Mark 1.0, https://creativecommons.org/publicdomain/mark/1.0/, Public Domain.
The National Heritage Institute, dating 1910, Creative Commons (CC BY-SA 4.0) https://creativecommons.org/licenses/by-sa/4.0/, Digitally Enhanced.
Berlin State Museums, Art Library, Mark 1.0 https://creativecommons.org/publicdomain/mark/1.0/, Public Domain.
Courtesy of the Indianapolis Museum of Art at Newfields, dating 1909, Public Domain.
Berlin State Museums, Art Library, Mark 1.0, https://creativecommons.org/publicdomain/mark/1.0/, public Domain.
State Museums of Berlin, Art Library / Dietmar Katz. Mark 1.0, https://creativecommons.org/publicdomain/mark/1.0/ Public Domain.