Stiftskirche St. Peter und Paul

The Benedictine monastery at Obermarsberg stands on the Eresburg heights above the town of Marsberg in North Rhine-Westphalia. Founded by Charlemagne late in the eighth century, it was later incorporated into Corvey Abbey and served as a monastic community known as a provostry until its dissolution in 1803. Today the former collegiate church of St Peter and St Paul remains in use as the town’s Catholic parish church and is listed as a protected monument. The site witnessed key moments in early medieval history. In 799 Pope Leo III visited and confirmed rights granted by Charlemagne, while in 938 a feud between King Otto I and his half-brother Thankmar ended violently inside the church. A crowned head on a pillar still recalls Thankmar’s death. The church’s architecture reflects these centuries: a Romanesque-Gothic hall with massive pillars, a 53-metre tower reduced after the Thirty Years War, and a crypt beneath the choir once thought to mark the Irminsul. Visitors enter through the Benedictus arch gatehouse of 1759 into a quiet ensemble of buildings. Inside, the church combines baroque fittings with a few older survivals such as a late Gothic Anna selbdritt and a 1719 high altar painted with scenes of the Nativity and the Immaculate Conception. The tower hall holds iron grave slabs of 18th-century canons, while the crypt’s Latin inscriptions and Sturmius altar recall the site’s missionary past. The surrounding town preserves traces of the old monastery’s farms and parishes at Niedermarsberg and Thülen.