Obermarsberg

Obermarsberg is one of seventeen quarters in the municipality of Marsberg, North Rhine-Westphalia, Germany.

The location was originally the site of an Iron Age hillfort, founded probably sometime before or during the era of the Roman-Germanic wars; including the Battle of the Teutoburg Forest (circa AD 9) and the Battle of the Weser River (circa AD 16).

Although it is unclear whether the surrounding area was controlled by the Cherusci, Chatti, or perhaps Marsi (as described by Tacitus), no particular reference to the Eresburg is known prior to the Saxon Wars (AD 770–785).

Local lore states that as Charlemagne's forces approached, the town's common folk would move into the Drachenholler, a vast system of underground gypsum caves beneath Eresburg, where they remained unnoticed until Charlemagne's people left.

The Irminsul was replaced by a stone structure, possibly a tower, the crumbling remains of which can still be seen.