The oblong-spahed wooden church was completed in 1730. The original medieval church was replaced by a wooden one, but it was destroyed by fire in 1680.
The inner roof is covered with paintings made by Hans Georg Schüffner. The altar and pulpit were made by Nils Falk in 1739. The oldest item is a crucifix, dating from the 13th century. It has been made in Limoges, France.
References: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.