Jesus Church is one of the largest and most important Protestant churches in Poland. The construction of the Lutheran basilica was made possible with the assistance of Sweden's Charles XII, who forced Austrian Emperor Joseph I to provide right for Protestants. Late Austrian Baroque in style, Jesus Church was constructed between 1709-1710 and the bell tower was erected in 1750. In the first two decades of the church's existence, it was a significant center of pietism.
The church has a capacity of 6000 people (sitting on benches) and a lot of standing places if necessary. The Church also houses the Protestant Museum altogether with Tschammer Library which has about 23 000 books in its collection.
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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.