आदनक्षेत्रम्

This place is also called Bhargava shetram.

The moolavar is Aandalakkumaiyan also called Aadanoorai Aandu Alakkum Aiyan in a reclining form. The Lord is seen with a Marakkal (measuring jar) as a pillow. On the left hand is an Olai (palm leaf) and Ezutthani (a writing implement). Figures of Tirumangai Azhwar and Kamadhenu are seen at the feet of the deity. The Thayar is Ranganaayaki. The Theertham is Surya Theertham and the Vimanam Pranava Vimanam. The sthala vriksham is Patali tree. There is a separate sanctum for Thayar.

Legend has it that Kamadhenu as well Agni the fire God worshipped Lord Vishnu at this shrine. The shetram is referred to as Aadi Rangeswaram in the Brahmaanda puraanam indicating that this shrine predates Srirangam temple.Vaikunta Ekadasi is the major festival celebrated in this temple.