Pragjyotishpura
Pragjyotishpura () or Pragjyotisapura, now deemed to be a region within modern Guwahati, was 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 Puranic text like 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. Etymology
The Pragjyotishpura is derived from Sanskrit. Prag means former or eastern and 'jyotisha' a 'star', 'astrology', 'shining', 'pura' a city thus meaning ' city of eastern light ' otherwise 'city of eastern astrology'. Location of Pragjyotishpura
No inscription up to the 12th century, when the kingdom of Kamarupa came to an end, give an indication of the location of Pragjyotishpura, and the exact location is not known. Three late medieval inscriptions seem to suggest that Pragjyotishpura included the Ganeshguri (inscription from Dununtarai, 1577). Southern slope of Nilachal hills (inscription from Dihingiya Borphukan 1732) and Navagraha temple (inscription Tarun Duara Borphukan, 1752). There are various other theories that modern historians have put forward, but none of them are backed by archaeological evidence. The location of a temple of planet worship called Navagraha, meaning abode of nine planets of the solar system, and its connection with ancient research on astronomy and astrology lends weight to the origin of its name. 