The Basilica of St. Martin is the main Catholic church of the city of Bingen am Rhein. The church is located on the bank of the Nahe. It was restored and renovated several times, so it is a fusion of different styles. Around 793 the crypt was built, one of the oldest crypts of Austrasia.
The church is dedicated to St. Martin of Tours, who is depicted above the main entrance and in many frescoes and the altarpiece.
In 1416 the church was enlarged and remodeled in the Lombard Gothic style; in 1505 it was beautified with works of art.
The church has been a minor basilica since 1930.
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.