Novi Sad and Petrovaradin Fortressa

Novi Sad, Serbia’s second-largest city and the administrative center of the Autonomous Province of Vojvodina, stands on the Danube. Petrovaradin Fortress occupies an elevated position across the river from the city center.

The surviving bastion fortress was constructed by the Habsburg Monarchy between 1692 and 1780 to defend its southern frontier against the Ottoman Empire. It replaced earlier fortifications on a site where archaeological research has identified evidence of human occupation extending back to the Paleolithic period. The complex includes upper and lower fortifications, barracks, bastions, and approximately 10 miles (16 kilometers) of underground military galleries arranged across four levels.

The upper fortress is marked by an 18th-century clock tower whose large hand indicates the hours and smaller hand the minutes. This arrangement made the hour easier to read from Novi Sad and from vessels traveling along the Danube.