Floor plan of <a href="//commons.wikimedia.org/wiki/Frankfurt_Imperial_Cathedral" class="mw-redirect" title="Frankfurt Imperial Cathedral">Frankfurt Imperial Cathedral</a>
<a href="//commons.wikimedia.org/wiki/User:BjKa" title="User:BjKa">BjKa</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>, based on a PNG drawn by <a href="https://de.wikipedia.org/wiki/Benutzer:Magadan" class="extiw" title="de:Benutzer:Magadan">Magadan</a>