The purpose of this study was (1) to find out the condition of the Siak Kingdom before Tengku Besar became Ragent. (2) to find out the condition of the Siak Kingdom during the Tengku Besar became Ragent. (3) to find out the end of Tengku Besar's tenure as a Ragent in the Siak Kingdom. Siak Kingdom is a Malay patterned kingdom which was founded in 1723 in Buantan with its first king, Raja Kecik,…