The Doberschauer Schanze (Upper Sorbian Dobrušanske hrodźišćo, also Skalenburg Dobruš) is an oval ring wall about 300 m south of Doberschau in Upper Lusatia over the 30 m high impact slope on the right bank of the Spree, which is only the remains of the former fortification.
In addition to the Budusin (Bautzen) tribal fortress 4.5 km to the north-east, the Slavic rock castle Dobruš is one of the most important early historical finds in the Bautzen area. The Spree used to flow directly around the rocky steep slope and thus provided excellent protection from the river side. On the other side of the field, a mighty stone/earth circular wall and strong palisades protected the complex. This made Dobruš impregnably fortified around the year 1000. In 1006, King Heinrich II gave Meissen Abbey three castles in the Milzen district. The castle is mentioned for the first time in the deed of donation. The »Trebista« mentioned here cannot be localized with certainty. Historians interpret either Dobruša / Doberschau or Kleindrebnitz near Bischofswerda as Trebista and belonged to the first property of the Church of Meissen in this region.
In 1223/1241, the narrow strip of land between Sebnitz and Doberschau, which was under the rule of the bishops of Meissen, is mentioned in the third section of the Oberlausitz border document. This was administered from Dobruš, but since the Burgward constitution was not as widely used in later Upper Lusatia as it was west of the Elbe, it was quickly forgotten.
Source: Wikipedia