Thorsager round church is the only one of its kind in Jutland (and one of Denmark's seven medieval round churches). It was built of brick around 1200 and is one of Jutland's oldest brick buildings - perhaps the oldest. Its thick walls (1m) are an indication of the defensive role it played.
The church may lie on the site of a pre-Christian sacrificial place for the god Thor. The size of the church and its architecture suggeste that is was built by an important man - probably the king. During restoration work in 1877-78 most of the church's outer walls were replaced with new bricks. Original bricks can still be seen in the north wall of the choir. During the last restoration in 1950-52 the beautiful church interior was restored with amongst other things a new altar and pulpit. There is access to the upper floor by a staircase within the door of the church.
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.