Mosaic by Heinz Klima, 1956. Das gute und das böse Prinzip (<i>the good and the bad principle</i>). At the corner Steinbauergasse/Böckhgasse, Meidling, Vienna.
<a href="//commons.wikimedia.org/wiki/User:Herzi_Pinki" title="User:Herzi Pinki">Herzi Pinki</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>