The Church of San Martino is located in the chief town of Arnad-Le-Vieux. The current building has a trapezoidal layout, with three naves that preserve a roof made of Gothic, low pointed cross vaults. The pillars support large arches that rest on capitals. The facade has a central tuff portal from the 15th century, decorated with a keel-shaped arch, representing two intertwined tree trunks with an overhead rose window. There are slender, single mullioned windows.
The bell-tower, with a square shape, has a high, pyramid-shaped spire. The ceiling on the left nave is decorated with Late Gothic frescoes. The subjects represented include “St. George fighting a dragon”, the “Feast of Herod”, a “Crucifixion” and the “Beheading of John the Baptist”.The parochial museum houses some interesting sacred objects.
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.