The church of St. Medardus, also called "Sommadorn" by the natives, was built over a prehistoric holy spring. This spring, which originally flowed underground from the altar through the nave, was damaged by tunnel work for the "Zufritt" reservoir in Martelltal, and in consequence the spring dried up. The apse covered with flagstones is remarkable, as are the Romanesque tower with rounded arch frieze and rounded arch window. Over the side portal are remains of a Romanesque crucificion group from the 13th century. Viewing only possible from outside (private property).