Aachen Cathedral

Aachen Cathedral (German: "Aachener Dom") is a Roman Catholic church in Aachen, Germany. It is one of the oldest cathedrals in Europe. Emperor Charlemagne ordered for it to be built in 796. He was buried there when he died. The church was made a UNESCO World Heritage Site in 1978. It was one of the first World Heritage Sites listed.
The building uses several types of architecture. The choir is built in a Gothic style. The core of the building is a chapel built in a Carolingian-Romanesque style. There are small parts that also use an Ottonian style, including an area around the throne.