The St. Birgit Memorial Church was built probably between years 1502-1505. It is dedicated in memory of St. Birgit who died in Rome in 1373 and was proclaimed as a saint in 1391.
Situated on the bordering area between the historic districts of Satakunta and Häme, the architectural style of the church exhibits certain influences from both of these areas. The shapes of the nave, rich in decoration, are typical of Satakunta, whereas the large, protruding cornerstones are unique to a very few number of churches in Häme.
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.