Burg Westerburg, Medieval water castle in Saxony-Anhalt, Germany

Burg Westerburg is a medieval water castle near Dedeleben in Saxony-Anhalt, built inside a 350 by 300 metre ring wall with a moat. Its oval core, about 70 metres across, has a ring wall up to 1.95 metres thick that also forms the outer wall of the residential buildings. The 33-metre round keep is set into the south-west of this ring, with its entrance 12 metres above ground. A 34-metre castle-like annex with a small inner courtyard extends west.

The castle was acquired in 1180 by the Counts of Regenstein, who expanded it into a major fortress and residence. This transformation made it a key stronghold in the region during the medieval period.

The castle chapel was completed in 1681 under Henning Adolph von Steinberg and Anna Catharina von Münchhausen. Its carved wooden pulpit altar from the end of the 17th century is dated 1681 but unsigned, and the furnishings are attributed to Martin Kraft. The chapel is among the spaces visitors can see inside the complex.

The castle has operated since 2 July 2000 as a four-star superior hotel with a restaurant and spa. Visitors can reach it on the 80 km cycling route through the former Halberstadt district, and the Romanesque Road passes the site. The grounds lie west of Dedeleben in the Huy municipality.

The oldest part of the complex is the oval inner castle, about 70 metres across, whose ring wall forms the outer wall of the surrounding houses. The 33-metre round keep is set into this wall on the south-west side, and its entrance lies 12 metres above the ground.