Sutanphaa also Siva Singha ( – 14 December 1744) was the 31st king of Assam who reigned from (1714 to 1744 A.D.) He was the eldest son of Rudra Singha. Siva Singha was with his dying father at Guwahati, who then proceeded to the capital Rangpur where he ascended to the throne. He is noted for his elaborate system of espionage. He had numerous temples erected and made large gifts of land to them. With his support ''Hinduism became the pre-dominant religion of the Ahoms". The king was also a patron of music and literature and music and himself composed Sanskrit songs and learnt songs. During his reign also came the first Europeans to trade with Assam. Reign As per the death bed injunction of Rudra Singha, he was succeeded by his eldest son Siva Singha (reigned 1714–1744). Siva Singha ascended the throne on the 20th day of Magh, and assumed the Ahom name Sutanphaa and the Hindu name of Siva Singha. He gave up Rudra Singha's plan to organize a confederacy of the rajas of Hindustan and to invade Bengal (Mughal Empire), but obeyed his father's injunction to become a disciple of Krishnaram Bhattacharjya (Nyayavagish), the Shakta priest from nearby Nabadwip in present-day West Bengal. He gave the management of the Kamakhya Temple to Krishnaram, who came to be known as Parbatiya Gosain, as his residence was on top of the Nilachal hill. Siva Singha accepted him as the royal priest and made a large number of land grants to temples and Brahmin priests. Siva Singha is said to have established such an elaborate system of espionage during his reign that he had accurate information of everything that was done or spoken in the kingdom. Dafla expedition There was no war in his reign, except in January 1717 there was an expedition against the Daflas of the northern hills, who had again taken to raiding the plains people. After they had been reduced to submission, an embankment was constructed along the foot of the hills inhabited by them as protection against future raids. Bar Rajas Siba Singha was a staunch Shakta and was greatly influenced by the Brahmin priests and astrologers. In 1722, his spiritual guides and astrologers predicted that his rule would shortly come to end in near future, due to the consequences of chatra-bhanga-yoga. That he not only made many lavish presents to various temples and the