Concept
Version 8
Created by Boundless
Architecture under Constantine
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"640px-Trier_-_Aula_Palatina.jpeg."
https://commons.wikimedia.org/w/index.php?curid=25780244
Wikimedia Commons
CC BY-SA 3.0.