"Am Wannsee" (Lake Wannsee) Pencil drawing ; 1926 14,3 x 19,5 cm Signed The work is drawn on the back of a letter dated 10th December 1926. Liebermann answered the letter by drawing this view on Lake Wannsee. Drs. Margreet E. Nouwen, the author of the catalogue raisonne of the works on paper, has authenticated the work
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