In the Late Middle Ages and Early Modern Period it was frequently fought over due to its location between the territories of Brandenburg, Magdeburg and Brunswick.

In the areas of the Upper Aller and Ohre rivers, the former medieval principalities of Lüneburg, Altmark, Brunswick, Magdeburg and Halberstadt bordered one another and, in some cases, were even geographically enmeshed.

They owned large feudal estates which helped to give them considerable independence for long periods of time.

Presumably through a marriage to the inheriting daughter of the von Wederde family, that died out before 1404 and had been the feudal tenants (Pfandherren) at Calvörde, the barony went to the Alvenslebens of Rogätz Castle.

The lower part of the round bergfried in the centre of the inner courtyard is made of fieldstone, the upper storeys of red brick.

The southeastern side of the site is occupied by the three-storey reception hall (Palas) with its Gothic staircase tower.

On it are the coat of arms of Brunswick and an inscription dated 1590, the year the castle was renovated by Duke Henry Julius.