Haus Rodenberg, Moated castle in Aplerbeck, Dortmund, Germany

Haus Rodenberg is a water castle in Aplerbeck featuring an outer building complex surrounded by moats, formal gardens, and ponds. The layout follows the traditional design of a noble estate, with water features integrated throughout the property to create distinct zones.

Aplerbeck belonged to the County of Mark from the 12th century, and a knight Dietrich von Rodenberg was documented in 1290. The house was destroyed in 1424 during Dortmund's punitive raid on Aplerbeck and rebuilt by Hermann von Voss zu Rodenberg with an attached residential tower. Between 1689 and 1698 the castle was converted into a baroque water palace. In 1985 Elma von Alvensleben sold the estate to the city of Dortmund, which restored park and house until 1996.

Haus Rodenberg now holds seminar rooms of the Volkshochschule Dortmund, the city's adult education centre. The Märchenbühne, a puppet theatre for children and adults, performs here, and the rooms can be booked through the Volkshochschule for so-called Ambiente-Trauungen, civil weddings held in the historic setting. A restaurant also occupies the building.

The estate sits within public parkland in central Aplerbeck and is accessible for exploration from the outside. Visitors should note that portions of the building host classes and events, so access to some areas may be limited or require planning ahead.

The baroque rebuild of 1689–1698 left only the outer bailey with its economic wing standing; the main castle decayed in the 19th and 20th centuries. The city of Dortmund bought the estate in 1985 from Elma Freiin zu Innhausen und Knyphausen and restored house and park until 1996. The former mill pond and an orchard in the park draw visitors in summer.