<a href="https://en.wikipedia.org/wiki/Josef_Hader" class="extiw" title="en:Josef Hader">Josef Hader</a> at the Auditorium Maximum of the <a href="https://en.wikipedia.org/wiki/University_of_Vienna" class="extiw" title="en:University of Vienna">University of Vienna</a>, that was occupied by protesting students in autumn 2009.
Manfred Werner - <a href="//commons.wikimedia.org/wiki/User:Tsui" title="User:Tsui">Tsui</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>