Aachen Cathedral dates back to the time of Charlemagne and part of his imperial palace. Charlemagne himself is still in the cathedral, the large gold reliquary in the santuary area contains his remains. He was canonized in 1165 on the instigation of Frederick Barbarossa.
The cathedral was the coronation church of more than 30 German kings. The throne of Charlemagne is one of the treasures of the cathedral but can only be seen when on a guided tour which can be joined in the treasury.