Viminacium (VIMINACIVM) was a major city (provincial capital) and military camp of the Roman province of Moesia (today's Serbia), and the capital of Moesia Superior. 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 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.