 The famous Chinese traveler Hiuen Tsang visited the bustling city during the first half of the 7th century A.D. describes it as spreading over 40 li or 10–15 km.circuit area having excellent religious institutions, magnificent residential apartments, massive fortification and efflorescent palace complex, as the majestic imperial metropolis with acropolis and seat of cultural culmination of Kosal kingdom.During the Puranic period, this region was known to be part of Nishadha Kingdom.