Kalix Church is the northernmost medieval church in Sweden. It dates from the 15th century (first mentioned in 1472). Several items of medieval inventory are preserved including the font, altarpiece and two sculptures. The pulpit, a Baroque work, is from 1674, and is among the oldest to be found in the north of Sweden. The church has a separate wooden belfry, which was made in 1731. The church has been sacked by Russian troops twice, in the 18th and 19th centuries; the adjacent church cottages were burnt down.
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.