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).
Florentine 15th Century (possibly Domenico Veneziano or Luca della Robbia). A Young Man Sitting on a Stool Reading a Book (recto); The Fall of Man (a fragment of the lower part) (verso), c. 1450. National Gallery of Art, Washington.