Kostolac is also a center of the area called Stig and home of thermal power plants and coal mines.

The tribes of Autariatae and Scordisci are thought to have merged into one in this area after 313BC, since excavations show that the two groups made burials at the same exact grave field in Pecine, near Kostolac.

[6] The Celtic Invasions of Greece in 279 BC formed the sub-Celtic group of Scordisci who would according to Strabo, defeat and push the powerful Triballians towards the Getae,[7] the Scordisci self-rule in different regions of Serbia gradually ended with the Roman conquest of the Balkans in the 1st century AD.

Viminacium was the base camp of Legio VII Claudia, and hosted for some time the IV Flavia Felix.

Aside from the town of Kostolac, the city municipality includes the following settlements: In Kostolac is the archaeological site of Viminacium, a former Roman outpost with wide streets, luxurious villas, extensive baths and an amphitheater, just recently opened to the public.