Bokenäs Old Church is one of the most well-preserved medieval churches in Bohuslän. It was founded at some point in the early 12th century, and has been in use since. Except for parts of the interior, the weapon house from the 17th century, and the tower from 1752, most of the church is original. The church is open to the public daily during the summer, and for pre-arranged visits during the rest of the year, due to maintenance costs.
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.