The Archbishops of Mainz had the Mildenburg castle built at the end of the 12th century to secure their powerful position and to serve as a customs office. Around 1200, the castle keep was added, the first official reference dates to 1226. Rather diverse periods in history affected the castle: extending, capturing, damaging and reconstructing.
Mildenburg the seat of the Oberamtmann, the Archbishop's local administrator until 1803. It then passed to the Princes of Leiningen before Carl Gottlieb Horstig purchased it in 1825. It now houses a museum of icons and contemporary art. The castle’s inner ward once held the Teutonenstein, a 5 m-tall sandstone column found on Greinberg, the inscription of which is still a puzzle to this day.
Kakesbeck is one of the largest medieval fortifications in Münsterland and the oldest castle in Lüdinghausen. The imposingly grown complex originated in 1120 as a motte, a small hilltop tower castle. After numerous changes of ownership, the castle was extended onto two islands, but it was not until the 14th century that it underwent significant alterations and extensions under the von Oer family. The estate experienced its heyday in the middle of the 18th century, when it covered an area of almost one square kilometre and consisted of five further outer castles in addition to the core castle, which were secured by ramparts and moats.
The well-maintained condition of the castle today is thanks to the late Wilfried Grewing, the former lord of the castle. The foundation named after him has been particularly committed to preserving the property since 2020.