The fort (Inselfestung Wilhelmstein) was built in the years 1761-1767 by Wilhelm zu Schaumburg-Lippe. Today, it is a museum devoted to the military and living in the eighteenth century.
Museum: Wilhelmstein FortressCity: Wunstorf
Country: Germany
Address: Alter Winkel 16
Website: http://www.schloss-bueckeburg.de/besucher/festung-wilhelmstein