Uninhabited
Harbke Castle

In Saxony-Anhalt, Harbke Castle is a ruin built on the foundations of a medieval circular castle. It was a former residence of the noble Veltheim family.
History+
The castle's origins date back to the 14th century when Bertram and Ludolf von Veltheim took over the lordship of Harbke and built a moated castle called “Hertbike” in a wet depression on the outskirts of the village. This castle was protected by a double system of water and moats. Between 1572 and 1586, Achaz von Veltheim had a Renaissance castle complex built on the foundations of this circular castle. This new building consisted of two three-story wing structures, angled to each other and connected by a polygonal stair tower. A fire in 1731 severely damaged large parts of the castle, leading to extensive restoration work on the outbuildings starting in 1733.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:Schloss_Harbke_%C3%9Cbersicht.jpg
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 52.1912, 11.0475