Floor cross (6th c.) excavated in Bonn Minster, now in the Rheinisches Landesmuseum in Bonn, Germany. The cross was found in the floor of the first church of the 6th century on the site of Bonn Minster. It is made up of pieces of marble pressed into the wet mortar. It probably marked a grave.
<a href="//commons.wikimedia.org/wiki/User:Kleon3" title="User:Kleon3">Kleon3</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>