Collection: M. C. Escher (1898-1972). Prints and Drawings / Institution: Boston Public Library - Digital Commonwealth Search Results
https://www.digitalcommonwealth.org/search?f%5Bcollection_name_ssim%5D%5B%5D=M.+C.+Escher+%281898-1972%29.+Prints+and+Drawings&f%5Binstitution_name_ssim%5D%5B%5D=Boston+Public+Library
Une collection en ligne des scans hautes def de M.C. Escher. Tout le monde le connait sans le savoir ;)