The Castle can be visited
Museum
Bückeburg Castle

Bückeburg Castle, the ancestral seat of the House of Schaumburg-Lippe, is an edifice in Bückeburg, Lower Saxony. Originally built as a moated castle to monitor the Hellweg trade route, it evolved into a residential palace.
History+
The origins of Bückeburg Castle can be traced back to 1304, when Count Adolf VI of Schauenburg and Holstein-Pinneberg had a moated castle built. Initially, this consisted of a defensive tower and outbuildings. In the 14th century, the locality was granted market rights, and a chapel was erected. Under Johann IV, the complex transformed into a fortified castle with moats and bastions by 1527. From 1560, Otto IV of Schaumburg had the moated castle converted into a four-winged palace in the Weser Renaissance style in just four years. His son Ernst of Holstein-Schaumburg made Bückeburg his residence in 1607, granted it town rights, and had buildings constructed, including the town church and the Marstall.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Joachim Schneeleopard
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: 52.2589, 9.0436