The Dobberworth or Dubberworth is one of the largest prehistoric tumuli (Hügelgrab) in northern Germany, located on the isle of Rügen near Sagard. The Dubberworth is about 15 metres (49 ft) tall, and was made from an estimated 22,000 m3 of earth, making it the largest tumulus of Rügen. Archaeologists were not yet able to date the tumulus precisely, but assume it was used during the Bronze Age. The etymology of the name is also uncertain, "-worth" is linked to an old designation for an "elevated estate".