POTSDAM, GERMANY - APRIL 30, 1996: The Einstein Turm astrophysical observatory designed by architect Erich Mendelsohn in 1917 for Albert Einstein to validate his Relativity Theory Poster #855189282
POTSDAM, GERMANY - APRIL 30, 1996: The Einstein Turm astrophysical observatory designed by architect Erich Mendelsohn in 1917 for Albert Einstein to validate his Relativity Theory Poster #855189282
