Potsdamer Platz, Berlin,  1930s postcards   The lower photo is taken from the Columbushaus  of 1932 after the pentagonal traffic light column, 1924-1934 had been removed.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/28179929@N08">Sludge G</a>
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/sludgeulper/37392207341/">Potsdamer Platz, Berlin,  1930s postcards</a>