Fortress of Ulm

[1][2] After the final defeat of Napoleon in 1815, the victorious powers agreed to defend the states from the inside.

The fortress Ulm was planned by the Prussian construction manager Moritz Karl Ernst von Prittwitz und Gaffron and built under his supervision between 1842 and 1859.

[3] In peacetimes the fortress should hold 5,000 men of the federal army, in wartimes up to 20,000 soldiers.

The at this time first stone bridge across the Danube laid between both cities inside of the fortress.

was planned to be a turret in the Ruhe valley, which was not built for financial reasons.

The fort 10 (near Offenhausen) and the gun turret 11 on the railroad Ulm – Munich were not built for cost reasons.

An additional fort near Pfuhl was planned in the mid-1860s, but cancelled due to the dissolution of the German Confederation.

These buildings were (beginning with Böfingen and moving counterclockwise around Ulm): The last major expansion of the front line took place in the first years of World War I.

The bases Spitzäcker, Lehr, Weinberge and Kapellenberg and the forts Oberer Eselsberg Hauptwerk and Oberer Eselsberg Nebenwerk were improved and integrated in the numbering system as works 22, 26, 32, 70, 29 and 30 respectively.