The church on Hjarnø is one of the smallest churches in Denmark; it currently serves 87 parishioners. The church building appears to date from the 16th century. Although it originally lacked a bell tower, one was added in 1877 with a bell dating from 1425. Within the church, the granite baptismal font is made in the Romanesque style and dates from the 12th century. The altarpiece was carved by Jens Hiernøe in 1805. Hanging from the ceiling, there is also a model Viking ship, which was donated to the church by the Glud Museum in 1955.
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.