Viminacium () or Viminatium, was a major city (provincial capital) and military camp of the Roman province of Moesia (today's Serbia), and the capital of Moesia Superior (hence once a metropolitan archbishopric, now a Latin titular see). As of 2018, only 3-4% of the site has been explored. The site is located from the modern town of Kostolac in Eastern Serbia. The city dates back to the 1st century AD, and at its peak it is believed to have had 40,000 inhabitants, making it one of the biggest cities in the Balkans of that time. It lies on the Roman road Via Militaris. Viminacium was devastated by Huns in the 5th century, but was later rebuilt by Justinian. It was completely destroyed with the arrival of Slavs in the 6th century. Today, the archaeological site occupies a total of , and contains remains of temples, streets, squares, amphitheatres, palaces, hippodromes and Roman baths. Viminacium holds the distinction of having the largest number of graves discovered in any Roman archaeological site. As of 2018, 15,000 graves have been discovered. History The remains of Viminacium, the capital of the Roman province of Moesia Superior, are located in the territories of the villages of Stari Kostolac and Drmno, about 12 km from the town of Kostolac and about 90 miles southeast of Belgrade. Viminacium was one of the most important Roman cities and military camps in the period from the 1st to the 4th centuries. Its exceptional strategic importance was reflected in its roles both in the defense of the northern border of the Roman empire and, resulting from this, as a major communications and commercial hub. No less appealing to the Romans was its hinterland in the Mlava river valley, which is rich in ore and grains. In Roman times, the defenses of the town on the northern side directly faced on a southern branch of the Danube, and on the western side, the Mlava river – though later on, Viminacium spread onto the left bank of the Mlava. Thanks to the location, land and waterways, Viminacium represented one of those areas where the encounter of cultures between East and West was inevitable. Although the primary functions of its roads and other transport links were military and strategic, they also provided very lively traffic throughout antiquity, and certainly contributed to the way in which Viminacium became prosperous and an important trading and