• Pukkoliyur Natham, the old town, is now ruined and a wasteland. The city that arose later is the present Avinashi.
• Avinashi - Immortal. The name of the town is Pukkoliyur, the Lord is Avinashi, the name of the Lord has become the name of the town today.
• It got its name as Pukkoliyur because the Devas trembled and came here for asylum when Lord Shiva performed Agni Tandavam.
• It also has the names Dakshina Kashi and Dakshina Varanasi.
• It is believed that Brahma worshiped for 100 years, Airavata for 12 years, Tadakai for 3 years and Naga Kanya for 21 months.
• Vasishta got rid of Shani dosha by worshiping Lord Shiva in this temple.  Lord Shani here is an auspicious murthy.
• When Sundaramurthy Swami visited this place, sound of mangalavadya was heard in one house and crying in the opposite houses simultaneously. An elderly person informed Sundarar, “Long back, two boys went to bathe in the lake when one was swallowed by a crocodile. For another, the Upanayana ritual is now performed with instrumental music. The mother of the dead boy in the opposite house weeps, remembering that the upanayanam would have been done for her son too if he was alive.” The parents of the dead boy fell down at the feet of Sundarar. Compassionate Sundarar went to the lake, called the crocodile into it and prayed to Avinasiyappan to command Kaladeva to give him the full-grown boy. Immediately, the crocodile brought the boy back to the lake. Sundarar performed upanayanam for him also at that time.
• This Thalapurana was composed by Ilayayan Kaviraya.

Thirumurai : Padhigankal :   Sundarar -  1. எற்றான் மறக்கேன் (7.92); Songs :   Manikkavasagar -     நரியைக் குதிரைப் பரியாக்கி (8.50.7) ஆனந்தமாலை;                 Sekkizhar -     மைந்தன் தன்னை (12.72.9 & 13) வெள்ளானைச் சருக்கம்.  

• In this temple one should first visit the Vazhikatti Vinayaka, then visit the Ambal performing Tapas at Padiri tree and only then visit the Swami.
• Under the stone Deepa sthamba a solitary image of Sundar, a sculpture depicting a crocodile and boy are carved .
• It is only here that Kalabhairava Sannidhi is inside the first Prakaram; A garland made of Vadas is a special offering to Lord Bhairavar here.
• One KM from the temple is the lake where the boy was rescued from the crocodile and theere is a Sundarar Sannidhi on the bank.
• Haradattacharya praises this incident in a sloka in his text "Harihara Tarathamyam".
• Ambal Sannidhi has an image of a scorpion on the wall. It is believed that if a scorpion bites in this area, if they come here and do Pradakshinam, it will cure the poison.
• The Mysore Royals are closely related to the Avinasi temple.  The royal will assume office only after performing pooja here.
• There is a seven-tiered Raja Gopuram.
• Brahmotsavam in the month of Chaitra begins with the flag hoisting in Mrigasirsha Nakshatra and ends with the Ratha festival in Purva Phalguni.
• The temple tree Padiri blooms during the Brahmotsavam season.
• Inscription: Indicate the donations given to this temple during the times of Veerarajendra Cholan, Kulothunga Cholan, Veerapandian, Sundara Pandian, Konerinmai Kondan Veerananjaraya Wodeyar, Veerasikaraya Wodeyar, Vijayanagara Achudadeva Maharayar etc.
• An inscription reveals that Sundara Pandian was the builder of the Sundarar temple on the banks of the pond.
• Inscriptions from the time of Chikkadevaraya Wodeyar, who lived in 1695, are also on the surrounding hall walls; The inscriptions are also sanctum pillars.