Landsberg Castle is a ruined hillside castle on the hill of Moschellandsberg near the town of Obermoschel in the German state of Rhineland-Palatinate. It may be hired out for private events.
Wikipedia https://en.wikipedia.org/wiki/Landsberg_Castle_(Palatinate)
Address 67823, Germany
Coordinates 49°43'30.828" N 7°46'50.722" E