Federal Fortress Ulm-Untere Gaisenbergbastion

The Ulm Federal Fortress, to which the Lower Gaisenberg Bastion belonged, was constructed between 1842 and 1859. It was one of five federal fortresses financed by the German Confederation after the Napoleonic Wars to ensure internal security. Under the direction of Prussian fortress construction director Moritz Karl Ernst von Prittwitz und Gaffron, a polygonal main rampart of approximately nine kilometers was built. The Lower Gaisenberg Bastion itself was a strong core work of the main rampart. Its three-story reduit served as a defensive barracks, with an additional story added in 1896. The bastion also included a rampart system, an escarpe, a dry moat, a seconde flank, and a double caponier.