Sigmaringen (Swabian: Semmerenga) is a town in southern Germany, in the state of Baden-Württemberg. Situated on the upper Danube, it is the capital of the Sigmaringen district.
Sigmaringen is renowned for its castle, Schloss Sigmaringen, which was the seat of the principality of Hohenzollern-Sigmaringen until 1850 and is still owned by the Hohenzollern family.
Sigmaringen lies in the Danube valley, surrounded by wooded hills south of the Swabian Alb and around 40 km north of Lake Constance.
The surrounding towns are Winterlingen (in the district of Zollernalb) and Veringenstadt in the north, Bingen, Sigmaringendorf, and Scheer in the east, Mengen, Krauchenwies, Inzigkofen, and Meßkirch in the south, and Leibertingen, Beuron, and Stetten am kalten Markt in the west.
The town is made up of the following districts: Sigmaringen town center, Gutenstein, Jungnau, Laiz, Oberschmeien, and Unterschmeien.
Sigmaringen was first documented in 1077 and was part of the principality of Hohenzollern-Sigmaringen until 1850, after which it became the Prussian Province of Hohenzollern.
In the 11th century, the end of the Early Middle Ages, the first castle was built on the rock that protected the valley. The first written reference dates from 1077, when King Rudolf of Rheinfelden tried in vain to conquer Sigmaringen Castle. The city was officially founded in 1250. In 1325, it was sold to Ulrich III, Count of Württemberg. In 1460 and 1500, the castle was rebuilt into a chateau. About the county of Werdenberg Sigmaringen came in 1535 to the high noble family of the Hohenzollern.
In 1632, the Swedes occupied the castle during the Thirty Years' War.
From 1806 to 1849, Sigmaringen was the capital of the sovereign Principality Hohenzollern-Sigmaringen and residence of the princes of Hohenzollern.
As a result of the Sigmaringen Revolution of 1848, the Princes of Hechingen and Sigmaringen abdicated, whereby both principalities fell to Prussia in 1850. From 1850 to 1945, Sigmaringen was the seat of the Prussian Government for the Province of Hohenzollern.