stumbling block for Leopold Alfred Arnheim, Brunnenstr. 194, <a href="//commons.wikimedia.org/wiki/Berlin-Mitte" title="Berlin-Mitte">Berlin-Mitte</a>, <a href="//commons.wikimedia.org/wiki/Germany" class="mw-redirect" title="Germany">Germany</a>
<a href="//commons.wikimedia.org/wiki/User:FraCbB" title="User:FraCbB">FraCbB</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>