Sigmaringen Castle is a dramatic hilltop fortress overlooking the Danube River in the town of Sigmaringen, southern Germany. First mentioned in the 11th century, the castle was expanded over the centuries and became the ancestral seat of the princely family of Hohenzollern-Sigmaringen, a Catholic branch of the Hohenzollern dynasty. The castle’s architecture reflects a mix of medieval fortifications and later Romantic historicist styles, especially after significant 19th-century renovations. Its