The remains of the Castle can be visited
Wredenhagen Castle

The Wredenhagen Castle Ruin is situated in the Mecklenburg Lake District in Mecklenburg-Vorpommern.
History+
First documented in 1284 as "Novum Castrum Wenden," the castle was built on a natural elevation, further raised by earth excavated from its moat, serving as a border and defensive stronghold. The complex featured a nearly circular ring wall made of fieldstones and bricks, with a single access point in the northwest. Inside, there was a round keep, as well as residential and economic buildings. The castle changed hands multiple times, including the Lords of Werle and, for a period, the Brandenburg margraves.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Roland Neubert, Halle (Saale)
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: 53.2895, 12.5206