Claudium Virunum was a Roman city in the province of Noricum, on today's Zollfeld in the Austrian State of Carinthia. Virunum may also have been the name of the older Celtic-Roman settlement on the hilltop of Magdalensberg nearby. Virunum (Virunensis) is today a titular see of the Roman Catholic Church.
Municipium Claudium Virunum, or simply, Virunum, was founded under Emperor Claudius as the capital of the province of Noricum succeeding the town upon the hilltop of Magdalensberg, perhaps also taking its name from that settlement, which is widely believed to have been the royal capital city of the pre-Roman Celtic kingdom of Noricum, a town whose name is, as yet, not known. The new Roman foundation was situated on the main route from the Adriatic to the Danube, with a branch through south eastern Carinthia connecting Virunum with the Amber Road. Established on a flood-proof terrace on the edge of Zollfeld parts of the city stretched as far as Töltschach Hill in the east.
The city had the Latin Right and was the seat of the provincial governor (procurator Augusti provinciae Norici) till the middle of the 2nd century. After the Marcomannic Wars (which the Romans called bellum Germanicum) the administration of the province was moved to Ovilava, today's Upper Austrian town of Wels, but the administration of the province's finances remained in Virunum. When Emperor Diocletian split the large province of Noricum, Virunum became the capital of the province of Noricum mediterraneum.
From AD 343 Virunum is known to have been a bishop's see. Little is known about the decline of the city. Being unfortified and situated in a flat valley, during the Migration Period (the "Barbarian Invasions") the city was probably partly or totally evacuated by its inhabitants, who left for the surrounding hills such as Ulrichsberg or Grazerkogel. In the 5th century there is mention of Teurnia in western Carinthia near today's town of Spittal an der Drau as the capital town of Noricum.
The territory administered from Virunum comprised central and lower Carinthia as well as parts of Styria and covered an area of about 9000 km². The usual authorities such as city council, magistrate and dual mayorship ("II viri iure dicundo") are known in part by name.
The city proper covered an area of about 1 km². Excavations were first undertaken in the second half of the 18th and the beginning of the 19th centuries, yet documentation is poor. Extensive and systematic excavations took place from end of the 19th century until 1931. Further excavations were not undertaken until the end of the 20th century culminating in the excavation of the amphitheatre.
The city's layout is that of a checkerboard, with the main axis running SSW-NNE, along which the Forum and the Capitolium with two adjacent blocks to the west have been excavated. A Dionysus-mosaic of almost 30 square metres was discovered. The city's streets were not fortified, but the sewage system, lead pipes and public water places are proof of a fine water supply and disposal.
Apart from the city capitol, a Dolichenum for the military god Jupiter Dolichenus was excavated, inscriptions have been discovered proving the existence of two Mithraea, and in 1999 two votive relief plates were found from a Nemesis temple near the amphitheatre. Proof of an early Christian church, whose existence had been presumed for a long time, has recently been found in the northern section of the city.
A proper Roman theatre with a stage, the only one known in all Noricum, as well as elliptic amphitheatre were situated on the slope of Töltschach Hill. A large building further east is believed to have been the palace of the Praeses or provincial governor.
Several Roman stone slabs from Virunum have been incorporated in the Prunnerkreuz ("Prunner's Cross"), a small shrine from 1692 at the northern limits of the city. Johann Dominikus Prunner was the Secretary to the Estates of the Duchy of Carinthia and a private archaeologist.
Believing the city's name to have been Sala, from which name nearby Maria Saal's name was supposedly derived, Prunner had a medallion stele put in the southern wall of the sanctuary on which he had the inscription added HIC LOCVS EST UBI SALA STETIT - PENETRARE VIATOR (This is the Place where Sala once was. Wanderer, step inside). Other Virunum stones integrated are
Media related to Virunum at Wikimedia Commons