The Church of the Holy Cross (Église Sainte-Croix) was formerly the church of a Benedictine abbey founded in the 7th century, and was built in the late 11th-early 12th centuries. The façade is in the Romanesque architectural style.
The church has a nave and four aisles, a transept with apses on each arm, and a polygonal apse. The nave is 39 m long, while the apse is 15.30 m high. Its organ dates from the 18th century.
In the 19th century, the church was renovated by Paul Abadie. The former Benedictine abbey now houses the École des beaux-arts de Bordeaux.
References:Prunn Castle is perched on an almost vertical Jurassic outcrop high above the Altmühl river valley south-west of Regensburg. Its impressive appearance from a distance is matched by the views from the castle of the surrounding Altmühltal countryside.
Lords of Prunn were first mentioned in 1037, and they will have certainly chosen the site because of its favourable position on several transportation routes. The castle itself dates from around 1200, a time when many castles were being built. The Danube region centring around Kelheim became very important in this period under the Bavarian duke Ludwig I. One of the oldest parts of the castle is the 31-metre keep.
In 1288, Duke Ludwig of Bavaria acquired the castle from the lords of Prunn-Laaber. In the first half of the 14th century the duke then invested the Fraunberg vom Haag family with the castle.