Thiruvaheendrapuram

The temple in its current form is believed to have been built during the Medieval Cholas, with later expansion from Pandyas, Hoysala Empire and Vijayanagara Empire. The temple has fifty inscriptions from Kulothunga Chola I (1070–1120), Vikrama Chola (1118–1135), Rajaraja Chola III (1216–1256), Jatavarman Sundara Pandyan (1251–1268), Vikrama Pandya, Vira Pandya III, Vijayanagar king Achyuta Deva Raya (1529–1542 CE) and Koperunjinga.

A granite wall surrounds the temple, enclosing all its shrines and bodies of water. The rajagopuram, the temple's gateway tower has five tiers and raises to a height of 60 ft (18 m). Though the presiding deity is Devanathaswamy, the temple is known for Hayagriva, the horse faced avatar of Vishnu. The temple is the only historical temple in South India to have a shrine of Hayagriva.

Devanathaswamy is believed to have appeared to Adisesha (the sacred serpent of Vishnu), sage Markandeya and Hindu god Indra. Six daily rituals and three yearly festivals are held at the temple, of which the chariot festival, celebrated during the Tamil month of Chittirai (March–April), is the most prominent.