The church as it stands today was begun at the outset of the 15th century. A four-storey tower had already been constructed a century earlier. The tower's later top two storeys were donated by the widow of the Lord Mayor, Adelheid of Besselich. The market church's tower, now at a height of 62 m (200 ft), was taller than the Cathedral's towers, one of which was in turn raised by a storey a few years later. Especially striking in the interior are the Late Gothic colour scheme and the stone retable of the former St. Michael's Altar.