In 1910 during the restoration of Angerdshestra church 30 old pergaments were found revealing that the old church was inaugurated in the 13th century. Today documents are located in Stockholm Historical Museum. The current church was made of wood in 1669 to the site of medieval church. It was enlarged and restored in the 18th century. The oldest artefact is a wooden sculpture of St. Anne, dating from the 15th century. The altar was probably painted by Johan Kinnerus between 1716-1717.
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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.