Hohenzollern Castle
Hohenzollern Castle is a hilltop castle located on the Berg Hohenzollern, an isolated promontory of the Swabian Jura (NHN) above sea level, above and to the south of Hechingen, Germany approximately south of Stuttgart, capital of Baden-Württemberg. This mountain lends its name to the local geographic region, "der Zollernalbkreis", and is known among locals as "Zollerberg" (Zoller Mountain), or simply "Zoller".
Sigmaringen
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 and residence of the princes of Hohenzollern. 
As a result of the Revolution in Sigmaringen of 1848, the Princes of Hechingen and Sigmaringen waived on their rule, whereby both principalities in 1850 fell to Prussia. From 1850 to 1945 Sigmaringen was the seat of Prussian Government for the Province of Hohenzollern. Karl Anton von Hohenzollern was 1858-1862 Prime Minister of Prussia. 
From 1914 to 1918 around 150 men from the town lost their lives during World War I. 
In the Nazi era a Gestapo office was in Sigmaringen. Since 1937 it belonged to the Gestapo Stuttgart.