To be privately owned
Neippergsches Castle

The Neipperg Castle in Heilbronn-Klingenberg is a structure on a mountain spur above the Neckar river. It originated from a medieval castle and served as the main residence of the Lords of Neipperg, before being transformed into an estate.
History+
The origins of Neipperg Castle date back to the 13th century, when a local noble's castle stood on this site. This castle was owned by Weißenburg Monastery, which leased it to the Margraviate of Baden, who in turn enfeoffed the Lords of Klingenberg with it. In 1360, the Lords of Klingenberg came into conflict with Charles IV, leading to the castle's capture by the army of Count Palatine Ruprecht. Emperor Charles IV prohibited the reconstruction of the castle in 1361 and allowed Heilbronn to use its stones for their own building projects. In the early 15th century, Eberhard von Neipperg acquired the margravial fief in two stages. The Neipperg family erected new buildings on the old foundations, which were referred to as a castle from 1439 onwards. Philipp von Neipperg moved his main residence to Klingenberg in 1554, leading to further construction.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: https://commons.wikimedia.org/wiki/File:Klingenberg-schlossblick.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: 49.1186, 9.1578