Alwarthirunagari Permual Temple is a Hindu temple, dedicated to the god Vishnu, in Alwar Thirunagari, a town in Thoothukudi district in the Indian state of Tamil Nadu.
It is located 26 km from Tirunelveli. 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. It is one of the 108 Divya Desams dedicated to Vishnu, who is worshipped as Adinathar and his consort Lakshmi as Athinathanayagi.
The temple is also classified as a Navatirupathi, the nine temples revered by Nammalvar located in the banks of Tamiraparani river. The temple is the most prominent among the nine Navatirupathi temples. The temple is one of the Navagraha temples in Vaishnavism, associated with Jupiter, the Guru.
A granite wall surrounds the temple, enclosing all its shrines and two of its three bodies of water. The rajagopuram, the temple's gateway tower, is 95 ft (29 m) tall. The temple is considered the birthplace of Nammalvar, considered the most prominent among the twelve Alvars Saints.
The temple follows Tenkalai tradition of worship. Six daily rituals and three yearly festivals are held at the temple, of which the ten-day annual Brahmotsavam during the Tamil month of Chittirai (April - May) and the Nammalvar birth celebrations with Garudasevai with all nine temple of Navatirupathi, being the most prominent. The temple is maintained and administered by the Hindu Religious and Endowment Board of the Government of Tamil Nadu.
Brahmanda Purana one of the eighteen sacred texts of Hinduism and written by Veda Vyasa contains a chapter called Navathirupathi Mahatmeeyam. The second part of the chapter refers to Alwar Thirunagari. The temple is revered in Nalayira Divya Prabandham, the 7th–9th century Vaishnava canon, by Nammalvar. The temple is classified as a Divya Desam, one of the 108 Vishnu temples that are mentioned in the book.
The temple is also classified as a Navatirupathi, the nine temples revered by Nammalvar located in the banks of Tamiraparani river. The temple is the most prominent among the nine Navatirupathi temple. Nammalvar makes a reference about the temple in his works in Tiruvaymoli. During the 18th and 19th centuries, the temple finds mention in several works like 108 Tirupathi Anthathi by Divya Kavi Pillai Perumal Aiyangar.
The temple also forms a series of Navagraha temples where each of the nine planetary deities of one of the temples of Navatirupathi. The temple is associated with the planet Jupiter, called Guru.