Ss. Peter and Paul church in <a href="//commons.wikimedia.org/wiki/Krak%C3%B3w" title="Kraków">Kraków</a>, southern aisle's vault
<a href="//commons.wikimedia.org/wiki/User:Pko" title="User:Pko">Pko</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>