The belfry of Abbeville is one of the oldest in France, built in 1209. On 20 May 1940, during a bombing, its roof was damaged and it was only in 1986 that it was rebuilt. The belfry is one of the fifty-six belfries of Belgium and France registered in 2005 by the World Heritage Committee of UNESCO in recognition of its testimony to the rise of municipal power in the region and its architecture. It has housed the museum of the city since 1954.
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.