Tomb stone at the outer wall of <a href="https://en.wikipedia.org/wiki/Speyer_Cathedral" class="extiw" title="en:Speyer Cathedral">en:Speyer Cathedral</a>, Germany
<a href="//commons.wikimedia.org/wiki/User:Maulaff" title="User:Maulaff">Maulaff</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>