Sigmaringen 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.
Wikipedia https://en.wikipedia.org/wiki/Sigmaringen
Coordinates 48°5'8.104" N 9°13'4.396" E