The remains of the Castle can be visited
Grevenburg Castle

The Grevenburg castle ruin in Traben-Trarbach was once the residence of the Counts of Sponheim and now offers a view of the Moselle landscape.
History+
The Grevenburg was built in 1350 by Count Johann III of Sponheim and replaced the Starkenburg as the residence for the rear County of Sponheim. After the Sponheim line died out in 1437, it served as the seat of the chief bailiff. In 1680, the castle was conquered by Louis XIV and integrated into the fortification system around the Mont Royal fortress under the direction of Sébastien Le Prestre de Vauban. After 1697, the Grevenburg lost its outer fortifications. During the War of the Spanish Succession, it was captured again by the French in 1702 and successfully defended against a siege in 1703.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://de.wikipedia.org/wiki/Datei:Grevenburg_in_Traben-Trarbach.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: 49.9466, 7.1155