Together with Speyer and Worms cathedrals this is also an Imperial Cathedral of the Holy Roman Empire. Being so old the cathedral also features different architectural styles: Mainly Romanesque with later additions of Gothic and Baroque. The octogonal tower is currently under renovations.
It is very big with stunning architectural features and there are some very interesting gravestones inside. Also some very old murals.
This is a beutiful cathedral an must definitely be visited