License, verbatimPD
The National Gallery of Art: open access image with no usage restrictions under the NGA's open access policy (openaccess=1 in the Gallery's published_images dataset).
Ernst Ludwig Kirchner. Liegender Rückenakt (Reclining Nude) (tailpiece, table of contents) from mock-up of Georg Heym: Umbra Vitae (Georg Heym: Shadow of Life), 1912/1922. National Gallery of Art, Washington.