 The German Huguenot Museum located here contains a picture archive, library, and family histories of the Huguenots in Germany.Charles I, Landgrave of Hesse-Kassel, had ambitious plans for town-planning and developing new water trade channels in the region; including a 'haven' in Karlshafen.Together with his engineer and architect Friedrich Conradi he developed plans for a Landgrave-Carl-Canal in order to avoid customs duty at Hannoversch Münden, but these were never finalised.