Bhismaknagar, Arunachal Pradesh 792110, India
Bhismaknagar fort, located nearly 30 km from Roing is tentatively dated to 8 century and is recorded as the oldest archaeological site in the region. Bhismaknagar. The site was first explored by I. Block in 1848 and afterward it was excavated from 1965-70. The complex houses the ruins of brick-built structure of 1860.52 sq. m plinth area, having three halls, two extension rooms and six entrances in all. It has two impressive gates .
Location of Bhismaknagar