East wall in the South Portal (<i>Bergportaal</i>) in the Basilica of Saint Servatius in Maastricht, the Netherlands.
<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>