The remains of the Castle can be visited
Eschweiler Castle

The Eschweiler Castle Ruin, once a moated castle, is located in the city of Eschweiler in the Aachen city region, North Rhine-Westphalia. Today, only three round towers remain, surrounded by modern hospital buildings.
History+
The origins of Eschweiler Castle likely date back to the 13th or 14th century, although neither an exact construction date nor the builder are known. In its place, an official residence for the bailiff already stood in 1145. In 1429, the castle was owned by Frambach von Birgel. From 1572, it was no longer subject to feudal obligations to the Duchy of Jülich, but rather to the Mannkammer zu Aldenhoven. In the early 17th century, the complex belonged to the von Hetzingen family, before passing to the Rhenish von Hompesch family for almost 180 years starting in 1654.
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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: 50.8180, 6.2646