This former 12C Romanesque basilica, dedicated to St Stephen, was given Gothic vaulting in the 15C, then "Baroquized" in the 18C, has a strikingly spacious nave and chancel. The main façade's Romanesque portal, framed by two Baroque towers, is adorned with busts of the twelve apostles and topped by a double-headed eagle holding two Turks' heads in its claws as a reminder of the terrible invasions that Austria experienced in the 16C and 17C.