Haus Buddenburg, Medieval château in Lippholthausen, Lünen, Germany

Haus Buddenburg was a neoclassical château built around 1845 by architect Ferdinand Zangerl for Baron August von Frydag, a few metres north of the old moated castle site. Its main building had a central risalit and four slightly projecting corner towers, crowned by a lantern-topped dome, with two two-storey pavilions in front. The grounds were bounded by the Lippe on the west, south and east and by a ditch on the north; the smaller Schloss Tegel near Berlin served as model.

A first castle was mentioned in 1293, built by the brothers Gottschalk and Gottfried Budde, who gave it their name; it was soon demolished on the orders of the Counts of the Mark. A new castle existed by 1338 under Evert Vridach, and from the 14th century the estate belonged to the von Frydag family. Around 1845 Ferdinand Zangerl built a neoclassical château for Baron August von Frydag a few metres north of the old castle site, modelled on Schloss Tegel. When the last baron died in 1902, his nephew Udo von Rüxleben inherited it; in the night of 2 May 1908 Rüxleben was shot by his wife, who then took her own life.

The Frydagstrasse near the former château keeps the name of the von Frydag family, who held Buddenburg from the 14th century. The estate passed to the city of Lünen in 1914, the year Lippholthausen was incorporated into the city, and the city acquired it from the heirs.

The château was demolished in 1977; privet hedges now trace the ground plan of the main house and outbuildings. The old paths of the surrounding park remain walkable, and the former moat no longer carries water. The Frydagstrasse nearby recalls the von Frydag family.

The château occupied a strategic location near an old crossing point of the Lippe River and was surrounded by water on three sides. An artificial moat to the north reinforced this natural water-based defense system.