The town, situated at the foot of the Petersberg, had the rights of a free Reichsstadt in the Middle Ages. From this former importance the large church building, which replaced a previous, similarly constructed building, where relics of the holy bishop Rufus from Metz were worshipped, testifies its former importance. Due to the closure of the vault arches the church has been divided into an evangelical (nave) and catholic part (chancel) since 1705. The two part flat-roofed nave was erected by Johann von Diepach in 1420. Here the north aisle has numerous wall-paintings dating back to the 15th century. The striking lenght and height of the chancel was achieved by master craftsman Arnold from Frankfurt between the years 1497 - 1507. The large diagonally-divided tracery windows reach to the vaulting caps and emphasize, after the reconstructed colour scheme, the height of the impressive room.
