Source

Source: Potsdamer Platz, Columbushaus, designed by Erich Mendelsohn,
on the right the Palast Hotel, 1932. photographer: Willy Römer.
bpk
picture agency, picture number 50132152. For rights inquiries, please
contact Art Resource at requests@artres.com (North America) or
bpk-Bildagentur at kontakt@bpk-bildagentur.de (for all other
countries).