ThiruVaragunamangai Perumal Temple (also called Vijayasana Perumal) is one of the Nava Tirupathi, nine Hindu temples dedicated to Lord Vishnu located in Tiruchendur-Tirunelveli route, Tamil Nadu, India in the banks of Thamiraparani river. All these 9 temples are classified as "Divya Desams", the 108 temples of Vishnu revered by the 12 poet saints, or Alwars.
The temple at Natham also known Chandran Sthalam, the 2nd of the Navathirupathis. Constructed in the Dravidian style of architecture, the temple is dedicated to Vishnu who is worshipped as Vijayasana Perumal and Lakshmi as Varagunavalli.
A granite wall surrounds the temple, enclosing all its shrines. The rajagopuram, the temple's gateway tower has five tiers. The temple follows Thenkalai tradition of worship.
Six daily rituals and three yearly festivals are held at the temple, of which the ten-day annual Vaikanda Ekadasi during the Tamil month of Margazhi (December - January) and the Nammazhwar 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. Vaikunta Mahatmeeyam is another work in Sanskrit that glorifies the temple and is a part of Tamraparani Sthalapurana available only in palm manuscripts.
The temple is revered in Nalayira Divya Prabandham, the 7th–9th century Vaishnava canon, by Nammazhwar. The temple is classified as a Divyadesam, 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 Nammazhwar located in the banks of Tamiraparani river.
The temple is next only to Alwarthirunagari Temple in terms of importance among the nine Navatirupathi temple. Nammazhwar makes a reference about the temple in his works in Thirvaimozhi. 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 Budha (Mercury).