The remains of the Castle can be visited
Stauf Castle

On a mountain ridge south of the Stauf district of Eisenberg in the Donnersbergkreis, Rhineland-Palatinate, lies the castle ruin of Stauf, a spur castle. It is considered the oldest documented castle complex in the Palatinate.
History+
The origins of Stauf Castle likely date back to before the year 1000. Around this time, Duke Konrad I of Carinthia from the Salian dynasty was first mentioned as a resident. In the 12th century, the castle, an imperial fief of the Staufer family from whom it also took its name, was owned by the Gottfried von Stauf family.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://www.wehrbauten.de/thread.php?threadid=1343
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: 49.5500, 8.0269