The Castle can be visited
Favorite Castle

In Ludwigsburg, Baden-Württemberg, stands Schloss Favorite, a baroque pleasure and hunting lodge. Its location offers a direct line of sight to Ludwigsburg Residential Palace.
History+
Duke Eberhard Ludwig commissioned the construction of Schloss Favorite between 1717 and 1723. The plans for the baroque-style building were drawn up by court architect Donato Giuseppe Frisoni. Originally conceived as a pure hunting lodge and summer retreat, it offered a view of the Residential Palace. In 1748, it served as the backdrop for a fireworks display celebrating the wedding of Duke Carl Eugen to Elisabeth Friederike Sophie of Brandenburg-Bayreuth.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://de.wikipedia.org/wiki/Datei:Schloss_favorite_park_blick.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: 48.9045, 9.1957