Tongeren Béguinage, founded in 1257 is listed as a UNESCO World Heritage Site since 1998. Its enclosure wall was destroyed in the 19th century: it separated the beguinage from the rest of the city and thus guaranteed peace and quiet for the small religion-inspired community. In the 17th century the beguinage counted some 300 beguines; it was also able to survive the 1677 fire that destroyed most of the city. In the center of the béguinage stands the Saint Catherine Church, built in 1294 and one of the oldest churches in the entire city.
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.