Arnulfsfeste Castle

Northwest of Moosburg's Mitterteich, three hills rise with the castle ruin of Arnulfsfeste, popularly known as "Mosaburch".

To the north is the Rauthügel, to the southwest the Thurnerhügel, and to the southeast the Arnulfhügel. It is a widely spread, partly heavily dilapidated complex, consisting of three distinct building complexes: on the Rauthügel the Carolingian "heribergium" as the oldest defensive structure, on the Thurnerhügel the actual main castle from the 12th-14th century, and on the Arnulfhügel the "Arnulfturm" surrounded by a curtain wall, the burgrave's seat from the 13th century. It is a tower with two-meter thick walls and a square footprint of 12 meters side length. On the west side, the tower has been preserved up to a height of 17 meters. The main building consisted of the fortified house with two rooms and a south-facing courtyard, which was surrounded by the curtain wall. A two-meter high masonry of layered rubble stones from the 12th century represents the lowest part of the house and curtain wall from the 13th century. Probably only in the late Middle Ages was the complex combined into a large defensive structure.