Biebersteinsches Castle

Around the year 1362, Kuno Rödel von Reifenberg expanded his Hahnstätten property into a castle, whose moat was fed by a side arm of the Aar river. The castle was conquered and completely plundered in 1392 by Count Palatine Ruprecht bei Rhein, whose troops also devastated the towns of Netzbach, Kaltenholzhausen, and Birlenbach. In the 18th century, the castle was converted into a palace. In 1815/16, the moated castle came into the possession of Baron Marschall von Bieberstein ("Bieberstein Castle") and remained in family ownership until 1969.

In 1824, the Baron initiated the urgently needed improvement of local roads, somewhat later the general cleaning of the Hohlenfelsbach stream, and at his instigation, Hahnstätten received its first fire engine as early as 1830, making it the first Aar community to do so. In these years, Hahnstätten experienced a significant upswing. When he died in 1834, Hahnstätten schoolchildren carried bricks to the cemetery as aid for the construction of a burial chapel for the deceased, which must be seen as a testament to the good relationship between the village and the Minister of State. In 1969, the castle and castle park were sold to a private individual and have since been used for residential purposes. Visits are not possible.