memorial for <a href="https://en.wikipedia.org/wiki/Johann_Philipp_Reis" class="extiw" title="en:Johann Philipp Reis">Philipp Reis</a> (1834–1874) in Frankfurt am Main, Germany
<a href="//commons.wikimedia.org/wiki/User:Dirschne" title="User:Dirschne">Dirk Schneider (ds-foto)</a>
CC BY-SA 3.0
Eigenes Werk (own work ) by ds-foto: <a rel="nofollow" class="external free" href="http://dsfoto.wordpress.com">http://dsfoto.wordpress.com</a>