Schlossberg, Hillfort on the Jasmund peninsula, Rügen, Germany

Schlossberg is a prehistoric fortification on a forested hill near Sassnitz on Rügen Island. The rectangular earthwork is bounded by ramparts and ditches that remain visible in the landscape today.

The site originated in the Neolithic or Bronze Age and was used over many centuries. Archaeological finds show that people from different periods lived and settled here.

The name Schlossberg, also Schlosswall or de Schlottbarg, led historian Johann Jacob Grümbke to propose the site once held a hunting lodge of Rügen's first princes. Shards of Slavic type found here support a Slavic-period use, and two entrances are said to hold small conical burial mounds in the ditch.

The hill is easily accessible from outside and offers a pleasant walk with good views of the surrounding area. Sturdy footwear is recommended since the ground is uneven and sometimes wet.

In the 1950s, gravel extraction destroyed large parts of the southern rampart; the cleared topsoil was piled up along the edge of the pit, forming a rampart-like ridge. A 4.5-metre-wide, flat berm between rampart and ditch was found in a 1939 trench, and its roughly 2-metre cut is still visible between the two western openings.