Pragjyotishpura
India
Pragjyotishpura or Pragjyotisapura, now deemed to be a region within modern Guwahati, is claimed to be an ancient city and capital of the Varman dynasty (350 - 650 A.D). Though the earliest mention of Pragjyotisha in local sources come from the 7th century, the form was changed to Pragjyotishpura in the 9th century which describes it as the city of Naraka within Kamarupa. In the Ramayana, Pragjyotishpura is described as the fortress of Narakasura on mount Varaha located in the north-west of the Indian subcontinent in what is modern-day Punjab and Sindh.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).