This Shivastalam is a vast temple known for its shrine to Raahu, one of the nine celestial bodies - Navagrahas- hence a Navagrahastalam visited by thousands. (Rahu and Ketu are associated with the legend of the churning of the milky ocean.)
Tirunageswaram is considered to be the 29th in the series of Tevara Stalams in the Chola kingdom located south of the river Kaveri.

It is located adjacent to the Vaishnava Divya Desam Uppiliappan Kovil outside the town of Kumbhakonam. Sekkizhaar, the author of Periyapuranam, named the temple that he built at Kunrattur in Tondai Nadu after this temple.

Offering worship at Kudandai Keezhkottam (Nageswarar temple) in the morning, at Tirunageswaram at noon and at Tiruppampuram in the evening on a given day is considered to be of special significance.

Legend has it that the mythological serpents Aadi Seshan, Dakshan and Kaarkotakan worshipped Shiva here. Legend also has it that Nala worshipped Shiva here as in Tirunallaar. Gowtama muni, Paraasarar and Bhageerata are also associated with legends related to this temple.