Ev.-luth. Kirche Bergkirchen, Romanesque church building in Bergkirchen, Bad Oeynhausen, Germany

The Evangelical Lutheran Church Bergkirchen is a hall church in Bad Oeynhausen whose south wall preserves full-height Romanesque masonry dated to around 1200, including two round-arched windows later lengthened downward. A Gothic choir replaced the Romanesque apse in the 14th century, and massive buttresses were added to the nave in late Gothic times. The west wall was renewed and the Romanesque tower rebuilt in the mid-19th century; the tower has a steep green roof, a clock, and a pointed-arch doorway.

According to the chronicler Heinrich von Herford, Pope Leo III consecrated the church in 799. The south wall of the present hall church contains Romanesque masonry dated to around 1200, and a 1967 archaeological survey during heating work found an earlier building beneath it. In the 14th century a Gothic choir replaced the Romanesque apse; in 1752 the north wall was moved out by three metres and a flat ceiling installed, and in the mid-19th century the west wall and Romanesque tower were rebuilt.

The parish is one of only two in Bad Oeynhausen belonging to the Minden church district, and it keeps partnerships with Mwangoi in Tanzania and Ribnita in Moldova. The CVJM Bergkirchen youth association is based here and has run an amateur theatre group for several years. A parish hall stands beside the church.

The church stands on a grassy slope in Bergkirchen, a district of Bad Oeynhausen; the Wittekindsquelle spring lies southwest of the tower on the church grounds, and the Bergkirchener Bach flows from it toward the Wulferdingser Bach. The parish also keeps a community house in Bergkirchen. Access to the interior depends on services and events, so check opening times with the congregation beforehand.

Southwest of the tower, on church grounds, lies the Wittekindsquelle, a spring said to be the site of a medieval Saxon spring shrine and of the spring miracle attributed to Duke Widukind; the scene appears on the Widukind monument on Herford's Wilhelmsplatz. Its water feeds the Bergkirchener Bach, which reaches the Werre via the Wulferdingser Bach.