Claudium Virunum was a Roman city in the province of Noricum, on today's Zollfeld in the Austrian State of Carinthia. Virunum was founded under Emperor Claudius as the capital of the province of Noricum. 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.
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 city was probably partly or totally evacuated by its inhabitants, who left for the surrounding hills such as Ulrichsberg or Grazerkogel.
The city proper covered an area of about 1 km². 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.
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.
References:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.