The Moolavar Oppiliappan or Uppiliappan - Srinivasan, is in a standing posture facing east resembles Venkatachalapati at Tirupati. Taayaar here is Bhumi Devi, enshrined in the same sanctum. Markandeyar, Kaveri and Yama worshipped Vishnu here.
Legend : Bhudevi was reborn as the daughter of Markandeya and an old man sought her hand in marriage. The sage attempted to stall the marriage till the old man revealed himself as Vishnu, and took Bhu Devi as his bride. Salt is not included in any of the offerings made to the deity; hence also, the name Uppiliappan. Legends associated with this temple are referenced in the Bhrahmaanda puraanam.
The temple: It has 50 feet high five tiered Raja gopuram, this east facing temple has two prakarams. Stone inscriptions mention temples of Tiruvinnagar - Tirunageswaram and Uyyakkondaar Valanaadu. Inscriptions date it back to the period of Rajendra Chola.
Festivals: The annual Bhramotsavams are celebrated in the months of Pankuni and Purattasi. The Vasantotsavam is celebrated in Vaikasi, and the Tirukkalyana Utsavam in Aippasi.