The remains of the Castle can be visited
Diepoldsburg Castle

The Diepoldsburg castle ruin is a double castle above the Lautertal in Baden-Württemberg. Comprising the Upper Diepoldsburg and the Lower Diepoldsburg, also known as Burg Rauber.
History+
The construction of Diepoldsburg is attributed to the Knights of Diepholdsburg around the year 1210. As early as 1215, a “Ulrich de Diepoltsburc” is mentioned in documents as the owner. In the 16th century, the complex progressively fell into disrepair. Between 1964 and 1965, restoration work was carried out on the surrounding walls to preserve the structure. It earned its nickname “Burg Rauber” due to its presumed use as a robber knight's castle.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: August Seyffer / Public domain 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: 48.5730, 9.4881