The oldest part of Radsted Church was built around 1200 in Late Romanesque style. the chancel was demolished in the early 1300s and rebuilt in Gothic style. The tower was originally erected in c. 1400 and restored in 1621. Radsted Church was enlarged in the 1600s and restored 1868-1870. The Renaissance altar and pulpit date from 1610. The font is made in Gotland and dates from the 1300s.
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.