Sri Ranganathaswamy Temple is considered the first, foremost and the most important of the 108 main Vishnu temples (Divyadesams).
Sri Ranganathaswamy Temple is a major pilgrimage destination for Hindus (especially Srivaishnavites) and the largest temple complex in India. This temple is also known as Thiruvaranga Tirupati, Periyakoil, Bhoologa Vaikundam, Bhogamandabam.
Srirangam temple is often listed as the largest functioning Hindu temple in the world, the still larger Angor Wat being the largest existing temple.
Sri Ranganathaswamy Temple is one of the three temples of the god Ranganata that are situated in the natural islands formed in the Kaveri river. It is the foremost of the eight self-manifested shrines (Swayam Vyakta Kshetras) of Lord Vishnu.
In the Vaishnava parlance the term "KOIL" signifies this temple only.
Sri Ranganathaswamy Temple is built on lands of 100's of acres with huge number of beautiful statues speaking volumes of the excellent sculptural skills of Tamilnadu having many halls, tanks and shrines. There are 21towers and inner rounds, the 4th being very popular and important. The main tower, Rajagopuram is the tallest in India. This is one of the biggest temples in India. The procession deity is Namperumal, Azhagia Manavalan, Sri Devi and Bhoo Devi. There are 8 holy springs including Chandrapushkarani and Suryapushkarani.
The hymns, sung by great 12 Vaishnavite saints, celebrated as Nalayira Divya Prabandam (4000 verses in praise of Lord Vishnu) elaborately speak of the glory of the Lord.
The annual gold ornament cleaning festival is called Jyestabisheka (first of anointing) and is celebrated during the Tamil month of aani (June-July). Brahmotsavam (Prime festival) is held during the Tamil month of Panguni (March-April). The preliminaries like ankurapuranam, rakshabandanam, bherira thanam, dhrajarohanam and the sacrificial offerings in the yagasala are gone through as usual.