<p>&lt;a href="<a class="external free" href="https://en.wikipedia.org/wiki/Columbushaus">https://en.wikipedia.org/wiki/Columbushaus</a>" rel="nofollow"&gt;en.wikipedia.org/wiki/Columbushaus&lt;/a&gt;
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postcards from the 1930s of the Pschorr Haus and the modernist  Columbushaus of 1932, designed by Erich Mendelsohn, featuring roof-top advertising for the Braune Post, the NS Sunday newspaper.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/28179929@N08">Sludge G</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/sludgeulper/37135116850/">Columbushaus, Potsdamer Platz,  Berlin W9 - postcards</a>