Uninhabited
Friedrichswerth Castle

On the southern edge of the municipality of Friedrichswerth in the Gotha district, Thuringia, lies Friedrichswerth Castle, a Baroque castle with an adjoining park. It has been preserved without fundamental alterations, apart from necessary technical adaptations.
History+
The origins of Friedrichswerth Castle date back to 1677, when Duke Friedrich I of Gotha commissioned master builder Jeremias Tütleb to construct a country residence. The village of Erffa, where the moated castle of Erffa previously stood, was chosen as the site. Construction was completed in 1689, and the castle was formally inaugurated in July of the same year. It served as a pleasure palace and summer residence for the ducal family. A court church was also built at the same time. The village of Erffa was renamed Friedrichswerth in honor of the Duke. However, Duke Friedrich I died at the castle in August 1691. In subsequent years, the castle remained a summer residence. Under Duke Friedrich III, the Hermit Order was founded here.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=589&sid=9b2b210ff3d27b7a80b9c70dbb4777c0
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: 50.9923, 10.5435