Srirangam is the foremost of the eight self-manifested shrines (Swayam Vyakta Kshetras) of Lord Vishnu . It is also considered the first, foremost and the most important of the 108 main Vishnu temples (Divyadesams). This temple is also known as Thiruvaranga Tirupati, Periyakoil, Bhoologa Vaikundam, Bhogamandabam. In the Vaishnava parlance the term “KOIL” signifies this temple only. The temple is enormous in size. The temple complex is 156 acres in extent. It has seven prakaras or enclosures. These enclosures are formed by thick and huge rampart walls which run round the sanctum. There are 21 magnificent towers in all prakaras providing a unique sight to any visitor. this temple lies on an islet formed by the twin rivers Cauvery and Coleroon.The temple of Sri Ranganathaswami at Srirangam boasts an historic past of great kingdom and a civilization thousands of years old. The reign of the Pallavas was marked by the creation of a solid religious foundation, for example the encouragement given by the dynasty appears to have contributed to the growth of Aryan institutions in Southern India more particularly in the Carnatic. Cholas reigned for about three hundred years over the Coromandel Coast and the greater part of Eastern Deccan, where they helped an advanced Hindu Culture to flourish.