The first stone church on the Lendum site was presumably a Romanesque building built around 1200. In the end of the 16th century, it was so dilapidated that a complete reconstruction was needed. The church was restored as the current red brick building which is whitewashed except the eastern end and the southern wall. The pulpit is from 1640 and the altarpiece from 1722. The beautiful altar rails are made in wrought iron and the Roman baptismal font is in granite.
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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.