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).
Walter Gramatté. Die Kalinkin-Brücke, bei der es nachts spukt (The Kalinkin Bridge Which is Haunted at Night) (plate 12) from Der Mantel (The Coat), 1919. National Gallery of Art, Washington.