In his desire for Christianization,
Charlemagne conquered the strategic area in 775. The original church, described as a
basilica, is documented in the
Annals of Lorsch as early as 776, making it the oldest in Dortmund and probably in
Westphalia. The present-day building dates from the 12th century. It was built around 1100 with a flat ceiling and was a
Wehrkirche (
Fortified church). The tower, still standing today, was built in the 13th century. The church was an important medieval pilgrimage site. The church was damaged by fire in 1673 during the
Franco-Dutch War leading to the destruction of the Romanesque
apse. Replacing the apse, the
chancel was built in 1688 with pointed windows in the
Gothic style. In the spring of 1945, at the end of World War II, the church was badly damaged by a bomb which completely destroyed the
nave. It was rebuilt, together with section of the chancel, from 1953 to 1954. During excavations in 1950–51, 1976–77 and 1983, foundations of a Romanesque
apse and a square building from the time of Charlemagne were found. == Furnishings and fittings ==