Syberg

The Syberg is a 240-metre hill in southern Dortmund, part of the Ardey Hills, with archaeological remains spanning from the Neolithic era through the Middle Ages. Around 700 AD, Westphalian Saxons built a hillfort called the Sigiburg, which Charlemagne captured in 775 during the Saxon Wars. The Saxons failed to reconquer it two years later. In the High Middle Ages, the Archbishop of Cologne established a castle on the site from 1150, which was destroyed in the 16th-17th centuries. Today, partial stone walls and the Vincke Tower remain, alongside a monument to Kaiser Wilhelm I.