Constructed in the Dravidian style of architecture, the temple is glorified in the Naalayira Divya Prabandham, the early medieval Tamil canon of the Alvar saints from the 6th–9th centuries CE.

[2] This temple is called as Thirumaliruncholai in Sangam literatures and Naalayira Divya Prabandham sung by Tamil Alvar saints.

The temple is maintained and administered by the Hindu Religious and Charitable Endowments Department of the Government of Tamil Nadu.

Suthapas, who is named as ‘Manduka Maharishi’ because of his frog form, performed penance on the banks of river Vaigai, which is otherwise known as Vegavathi, at Thenur.

[5] Kallalagar temple covers an area of about 2 acres (0.81 hectares) and has a seven-tiered gopuram (gateway tower).

The gopuram of the Karuppa swamy shrine depicts the passionate side of human relationship in the form of beautiful statues.

During 2013, while cleaning the area in front of Karupana Samy shrine, a big Teppakulam was discovered, filled with sand and covered with dense undergrowth.

[4] Kallalagar temple is revered in Naalayira Divya Prabhandam, the 7th–9th century Vaishnava canon, by Periyalvar and Peyalvar.

During the 18th and 19th centuries, the temple finds mention in several works like 108 Tirupathi Anthathi by Divya Kavi Pillai Perumal Aiyangar.

[4] Abhishekam, ablution of the presiding deity, is performed only with the waters from Noopura Ganga, a lake on the top of the hill.

Ethir Sevai is a part of the Chithirai Thiruvizha of the Kallazhagar temple at Alagar Koyil and begins on the fourth day.

This temple obtained a new car, after 300 years, built with a team of 15 artisans using vengai tree wood for the structure and Burma teakwood for sculptures.