Oscar Fredrik Church was drawn by Helgo Zetterwall and completed in 1893. It represents the neo-Gothic style, but the influence is not the Nordic gothic style but rather the style one can find in the large cathedrals down in continental Europe. The church and the parish got its name from king Oscar II (Oscar Fredrik being his full name).
The church has been refurbished three times: 1915, 1940 and 1974. The 1940 refurbishment took away the side galleries and the decorations on the arches and capitals were painted over. During the latest renovation in 1978 the pulpit was moved back to its original position (south side of the choir) and older wall paintings and decorations were brought back to light.
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.