According to the travel account of
Xuanzang, Kamarupa was entered after crossing the
Karatoya River. He described the eastern boundary of the kingdom as a line of hills near the Chinese frontier and estimated its circumference at nearly 1,700 miles (approximately 2,736 kilometres). According to the account given in the Si-yu-ki, the circumference of Kamarupa was about 1,700 miles (2,735.88 km). As Edward Albert Gait has pointed out, this circumference must have included the whole of the
Assam valley, Surma valley, parts of North Bengal, and parts of Mymensingh.
Religion Bhaskaravarman was primarily a worshiper of
Shiva but showed respect towards
Buddhist monks and scholars, reflecting an inclination towards Buddhism. The general populace worshipped various Devas in temples, while Buddhist followers often practiced their devotion in secret.
Culture During his reign, the Nidhanpur copper plate grant documents unique local literary forms, while Chinese accounts describe diplomatic exchanges with Harshavardhana's court. The Karnasuvarna copper plate grant also features distinct regional literary styles not found in later inscriptions.
Art and industry His gifts to Harshavardhana included land products such as a royal umbrella studded with gems, puthis on sachi-bark, cane mats, agar essence, musk, molasses, utensils, paintings, and silk fabrics, as recorded in contemporary accounts. ==Nidhanpur inscription==