The remains of the Castle can be visited
Hohenburg Castle

History+
The Hohenburg Castle Ruin, also known as Homburg Castle, was a hilltop castle and the ancestral seat of the Counts of Homburg.
In the 12th century, the Hohenburg served as the residence for the Counts of Homburg. In 1330, Emperor Louis IV granted town privileges to the settlement at the foot of the mountain. After the extinction of the Homburg line of counts in 1449, the castle and town passed into the possession of the Counts of Nassau-Saarbrücken. They had the complex converted into a Renaissance castle in the second half of the 16th century and later expanded into a fortress.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: https://commons.wikimedia.org/wiki/File:Hohenburg_004.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: 49.3210, 7.3448