The buildings are arranged around two courtyards which are connected with a staircase. In the past the outbuildings were arranged at the lower courtyard and the residential buildings around the upper courtyard.
At the upper courtyard there is also a chapel dating back to the 16th century. It is dedicated to the bishops St Albuin and St Ingenuin and painted with illusionist frescoes. The altar is adorned with paintings of the German king Henry II and his wife Kunigunde.
The castle walls are Romanesque, and other castle buildings are Renaissance in origin.