The remains of the Castle can be visited
Stuben Abbey

The monastery ruin of Stuben, a former Augustinian canonesses' convent, is picturesquely situated on a peninsula near Bremm on the Moselle. Today, the area is known for viticulture, marketed under the name "Abtei Kloster Stuben".
History+
The origins of Stuben Monastery date back to 1136, when it was founded as an Augustinian canonesses' convent. A nobleman named Egelolf transferred his property to Abbot Richard I of Springiersbach to enable the establishment of a monastery. A St. Nicholas church was erected. As early as 1137, a large convent of women settled there, its size limited to 100 nuns by Archbishop Albero of Trier. In 1208, Knight Heinrich von Ulmen handed over a valuable staurotheke with particles of the cross and other relics, which he had brought from Constantinople during the Fourth Crusade, to his sister Irmgard, then head of the convent. This relic made Stuben an important pilgrimage site.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://de.wikipedia.org/wiki/Datei:Klosterruine-Stuben-03.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: 50.1044, 7.1226