The Konrad-Adenauer-Haus in Berlin. It is the main office of the CDU and was built by the architects Petzinka Pink and partners.
<a href="//commons.wikimedia.org/wiki/User:Code" title="User:Code">Ansgar Koreng</a>
CC BY-SA 3.0 de
<span class="int-own-work" lang="en">Own work</span>