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Diocletianopolis in Thrace

Hisarya, Bulgaria

Diocletianopolis (Bulgarian, "Town of Diocletian") was an ancient Roman town in the region of Thrace, nowadays the town of Hisarya in Bulgaria. Its impressive remains include the enormous defensive walls which still stand close to their original height for the majority of their circuit. There is an on-site museum for the many objects discovered.

Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).

Other archaeological sites in Bulgaria