Emperor Friedrich III had the original church built in the 15C. The rich Baroque decoration was added to the elegant ribbed vaults later. On the outside wall, the "Gottesplagenbild" mural recalls the three scourges suffered by Graz in the late Middle Ages: the Turks, plague and swarms of locusts. Inside, note the two reliquaries, old ebony dowry chests with magnificent bas-reliefs in bone and ivory.