Lazar_El_Lissitzky_-_Kestnermappe_Proun,_Rob._Levnis_and_Chapman_GmbH_Hannover_-4_-_Google_Art_Project Published September 16, 2013 at 2695 × 3677 in PROUN ← Previous Next → El Lissitzky, PROUN Hannover 4 (1919) El Lissitzky, PROUN Hannover 4 (1919)