Dunnideer Castle, now ruined, was a tower house located near Insch, Aberdeenshire. It was built c. 1260 partially from the remains of an existing vitrified hill fort in the same location. It consisted of a single rectangular tower of 15m by 12.5m with walls 1.9m thick. Evidence suggests that a first-floor hall existed. Evidence shows it had several floors.
The tower house is built within an older prehistoric vitrified hillfort dating to c. 250 BC. The prehistoric fort and tower house is a scheduled monument.
References: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.