City of Siegen (Westphalia, Germany): Remains of the medieval city fortification; part of the southwestern wall on <i>Obergraben</i>. In the background the roof of St. Martin’s church <i>(Martinikirche)</i>.
<a href="//commons.wikimedia.org/wiki/User:Frank_Behnsen" title="User:Frank Behnsen">Frank Behnsen</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>