Frankfurt/M., Germany: Informational plaque in front of the <i>Naxos-Union</i> building. The company was a manufacturer of grinding machines since the late 1870s.
<a href="//commons.wikimedia.org/wiki/User:Frank_Behnsen" title="User:Frank Behnsen">Frank Behnsen</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>