Blasius Chapel in Bergweiler was first mentioned in a document among the possessions of Tholey Monastery in 1246. The main day of pilgrimage was the annual St. Mark’s day, on which a procession took place from Tholey to the chapel followed by a market. Inside, the chapel has three baroque altars in white, blue and gold. The figure of Saint Blasius is depicted on the high altar, with Saint Mark and Saint Wendelin depicted on the side altars and above them the coat of arms of Tholey Abbey and the abbot Dr. Petrus Bonne.
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.