Steiner Häuschen Castle

The Steiner Häuschen is the remnant of a medieval castle complex in Oberkassel, a district of the Bonn borough of Beuel. The origins of the complex date back to the 10th century. The Counts of Molbach (Maubach) were the owners at the end of the 12th century. Before 1210, Countess Alveradis von Molbach donated the "Haistilberg" estate to the Cistercian Abbey of Heisterbach. According to a report by Caesarius of Heisterbach, the tower of the complex was destroyed by lightning around the year 1217 and was not rebuilt.

During the new construction of the Bundesstraße 42 in the late 1980s, the remains of a large residential tower with a floor plan of 20 by 11 meters and an outer bailey were found. These were restored by the city of Bonn between 1985 and 1986. The Steiner Häuschen is protected as a "fixed archaeological monument".