Ehrenberg Castle dates from the early 12th century when it was built by the Counts of Lauffen. The oldest part of the wall around the main castle. The building of the main castle date from the 12th and 13th centuries. To existing keep dates from 1235. The castle was ruined in the Thirty Years' War. The new residential and farm buildings have been built in the 17th and 18th century. Today Ehrenberg is privately owned and can not be visited.
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.