In the 8th/9th century, a large early Slavic castle complex of the Wilzen family stood northeast of Lindenberg on a ridge up to 15 m high in the Augraben valley. From 1829 to 1864, the economic councilor Daniel Friedrich Maaß from Alt Kentzlin had already been investigating prehistoric and medieval finds in Pomerania. In the moat of the former castle complex, he was able to unearth eleven vessels as well as iron weapons, war knives, axes, swords, and spearheads. It was likely a refuge from the "Feldberg period," built on a rising spur of land. The entire eastern side of the castle appears to have been erected, as only the ramparts facing the Augraben have survived. In its final stage, the castle consisted of two sections and is now up to 180 m in size. At the highest point of the spur lies a small circular rampart with an outer diameter of approximately 45 m. Whether this is a later installation from the late 9th to 10th century must be clarified by modern archaeology!