To be privately owned
Pforzheim Castle

In Sulzfeld, Baden-Württemberg, stands Pforzheimer Schloss, a historic structure once owned by the Göler von Ravensburg family. The current building dates from the early 19th century and features a Renaissance portal from 1609.
History+
The present castle was constructed at the beginning of the 19th century. A preserved Renaissance portal from 1609 points to an earlier structure on this site. This portal features a Latin inscription and the alliance coat of arms of Engelhard I. Göler von Ravensburg and Anna Maria née von Mentzingen, the builders of the demolished Renaissance castle. Engelhard I.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=1785
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: 49.1020, 8.8568