Kungs-Husby Church date from the 14th century and it was enlarged between 1755-57. The medieval frescoes in walls were overpainted in the 18th century, but restored in 1859. The triumph crucifix (made in the 1200s) date probably from the elder wooden church. The limestone madonna statue was made in Rheinland around the year 1340. The Gustavian Classicism style pulpit was carved in 1789 by J. C. Krüger.
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Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.