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Beneath the streets of the Sremska Mitrovica, Serbia, lie the ruins of a former capital of the Roman empire - Sirmium.

Most of the city, including a hippodrome, still lies beneath the modern metropolis but some remains including a huge imperial palace complex have been excavated.

Some historians think as many as 18 Roman emperors were born in the territory of modern day Serbia and five of those were born in Sirmium.

Archaeologists are using 3D reconstruction techniques so people can digitally explore what the ancient city might have looked like.

The ´óÏó´«Ã½ Travel Show’s Rajan Datar reports.