
The octagonal core of Aachen Cathedral, Germany. Originally built c. 800 AD by Charlemagne as his Palatine Chapel, featuring stunning 19th-century mosaic restorations under the dome. [OC][2580x3440]

































The octagonal core of Aachen Cathedral, Germany. Originally built c. 800 AD by Charlemagne as his Palatine Chapel, featuring stunning 19th-c...