Interior view of the Basilica of Constatine in Trier, Germany. This large Roman building was once the throne hall of emperor Constantine the Great, who had it built around 310 AD as part of his palace. It is now a Protestant church.
<a href="//commons.wikimedia.org/wiki/User:Kleon3" title="User:Kleon3">Kleon3</a>
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<span class="int-own-work" lang="en">Own work</span>