French: Cathédrale d'Aix-la-Chapelle
The Aachen Cathedral is a World Heritage site in Germany defined by the UNESCO in 1978 and definitely a recommended cultural sightseeing location.
It our monthly survey..

"Construction of this palatine chapel, with its octagonal basilica and cupola, began c. 790–800 under the Emperor Charlemagne. Originally inspired by the churches of the Eastern part of the Holy Roman Empire, it was splendidly enlarged in the Middle Ages."
Copyright © 1992 2014 UNESCO/World Heritage Centre. All rights reserved."

Criteria:

(i)(ii)(iv)(vi)

Weblinks:

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