To be privately owned
Holsteinborg Castle

In the Danish region of Zealand, Holsteinborg Castle has a history dating back to the 13th century. Originally a medieval castle, it evolved into the edifice that stands today, known for its connection to Hans Christian Andersen.
History+
The origins of Holsteinborg Castle trace back to the 13th century, when a castle stood on this site. In 1536, during the Reformation, the property was confiscated by the Danish Crown. King Frederick II granted the estate to Niels Trolle in 1562.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Bococo / CC BY-SA 3.0 via Wikimedia Commons
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: 55.2146, 11.4642