Residential tower

Access to the keep is at ground level across from the chapel entrance – a short way for the archbishop. Positioned in the ground floor of the tower is a pillar with quatrefoils. The original Romanesque pillars might have been more massive, as they served as supports for the ceiling. The remains of a fireplace are found in the southwest corner of the ground floor. In the walls and the ceiling, clay pipes channeled warm air upward into the upper chambers.

This was a luxury in 12th-century Middle Germany – as was the outhouse, a small room set into the north wall. The majority of the peasantry slept on pelts and straw, while nobility slept in canopy beds. The canopy and the raised bed gave protection from any vermin that might crawl up or fall down onto slumberers, and the curtains guarded against cold and draughts.

Bedbugs, lice and fleas were a constant nuisance.