As it lay in the northern boundary region of their territory, the bishops authorized the counts of Dassel to act as their vogts until 1277.
It ceased to exist about one century after the Protestant Reformation, soon after the Thirty Years' War.
Right below the gable roof, lombard bands decorate the outer walls.
A unique double helix circular stairs is one of the architectural highlights but not publicly accessible due to a supporting wall that was built in the 17th century.
These stairs are classified as 13th-century work, the builder most likely stemming from the Levant region.