Logo of Technische Universität Berlin (2013)
<a href="//commons.wikimedia.org/w/index.php?title=User:TU_Berlin&amp;action=edit&amp;redlink=1" class="new" title="User:TU Berlin (page does not exist)">TU Berlin</a>
2013-02-20
<span class="int-own-work" lang="en">Own work</span>