Syberg

The Syberg is a hill in the Ruhr in the southern part of Dortmund, 240 m above sea level, which is part of the Ardey Hills [1]. The Syberg is part of the Ardey Hills, and was formed of sandstone and slate of the Namurian, a stratigraphic unit of the Carboniferous [1]. The oldest relicts of human presence on the Syberg are from the Neolithic and Bronze Age [1]. Syberg became a historical location during the Saxon Wars, when Charlemagne captured a hillfort on top of the hill named "Sigiburg" in 775 AD; two years later the Saxons failed with a reconquest of Sigiburg [1].