Fürstliches Residenzschloß, in the center of the Detmold town park, is a fine example of Weser Renaissance style. In 1263, Bernard III of Lippe fortified the settlement at the crossing of the trade route from Paderborn to Lemgo over the Werre River with stone walls and granted it a municipal charter. In 1550, Detmold became the permanent residence of Count Simon III of Lippe. The counts were elevated to princes in 1789, and Detmold remained the capital of the small Principality of Lippe until the end of the World War I in 1918, when all princely states in Germany were abolished. Detmold Castle is still in the hands of the Princes of Lippe.
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.