The remains of the Castle can be visited
Diersburg Castle

The castle ruin Diersburg, also known as Tiersperg, is on a rocky hill southeast of the district Diersburg in the municipality of Hohberg. This hilltop castle in the Ortenau district, Baden-Württemberg, has preserved remnants of a once fortified complex.
History+
The origins of Diersburg Castle date back to the late 12th century, when it was built by the Lords of Diersburg. An early mention appears in 1197, when it was referred to as “Stein zu Tiersperc” in the possession of Walter von Tiersperc. In 1259, the name “Diersberg” emerged. The complex underwent expansions in the 13th century and evolved into a joint heritage castle in the 14th century. During the Thirty Years' War, it suffered destruction, followed by further destruction by French troops in 1668.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://de.wikipedia.org/wiki/Datei:Diersburg_Ruine.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: 48.3838, 7.9493