The Hauptplatz (Main Square) forms the central heart of Graz's Old Town and is one of the city's most important sights since its creation by Duke Ottokar III around 1160. Magnificent late Gothic, Baroque, and Biedermeier façades dominate the cityscape. In the center stands the Erzherzog-Johann-Brunnen (Archduke Johann Fountain), a bronze statue of the Styrian prince unveiled in 1878, set on a pedestal with four allegorical figures representing the rivers Mur, Enns, Drau, and Sann. In the Middle Ages, Graz was an important center of commerce with fairs and weekly markets. Today the square hosts urban festivals, Christmas markets, and New Year's celebrations.