<p>Postcard c. 1950 reconstruction Alexanderplatz viewed from the railway sttion. 
Right centre Neue Koenigstrasse with the site of the Georgenkirche, blown up in 1949.
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What is the restored modernist building on the left?
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/28179929@N08">Sludge G</a>
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/sludgeulper/49998319198/">Postcard c. 1950  reconstruction of  Alexanderplatz</a>