[1] Unlike other Divya Desams where a single shrine is referenced, this set of temples is referred together in all the pasurams (sacred hymns).

The temples are believed to be of significant antiquity with contributions at different times from Medieval Cholas, the Vijayanagara Empire, and Madurai Nayaks.

Vishnu is regarded by adherents to have assumed the form of Varaha the boar to kill three demons named Tanchakan, Tantakan, and Kacamukan.

The temples are maintained and administered by the Hindu Religious and Charitable Endowments Department of the Government of Tamil Nadu along with Thanjavur Palace Devasthanam.

During the Treta Yuga, there were three demons by name Tanchakan, Tantakan, and Kacamukan who were blessed by Shiva and became very powerful.

Maamanikoil has a small east facing shrine with the Manikundra perumal and consort in the same sanctum sported in seated posture.

[3] Thanjiyali Nagar also called Veera Narasimha Perumal has a small east facing shrine with the main deity and his consort in the same sanctum.

[3] The temples are maintained and administered by the Hindu Religious and Charitable Endowments Department of the Government of Tamil Nadu along with Thanjavur Palace Devasthanam.

[6][7] The temples are revered in Naalayira Divya Prabandham, the 7th–9th century Vaishnava canon, by Thirumangai Alvar and Bhoothathalvar in one hymn each.