The temple is one of few places where there is a separate shrine for Brahma. This temple is one of the 7 shrines associated with "Saptamartrikas"(seven female deities in Siva temple). As per legends, Shiva is believed to have destroyed eight different demons namely Andakasuran, Gajasuran, Jalandasuran, Thirupuradhi, Kaman, Arjunan, Dakshan and Taaragasuran. There are Ashta Veeratanam temples built signifying each of his victories in the war, and also as places where he is believed to have performed with fury. The eight temples are: Tiruvadigai Veerattaaneswarar Temple at Thiruvadigai, Tirukkovilur Veerateshwarar Temple at Tirukoilur, Veerateswarar temple at Korukkai or Thirukkurukkai, Amirtagateswarar Temple at Thirukadaiyur, Vazhuvur Verateswarar Temple at Vazhuvoor, Keelaparasalur Veerateswarar Temple at Tirupariyalur, Kandeeswarar Temple at Thirukkandiyur and Tiruvirkudi Veerataneswarar Temple at Thiruvirkudi. Shiva in all these temples are described to have used bow and arrow, trident and spear. The "sapthasthanam" festival is conducted at Tiruvaiyaru during April every year. As per Hindu legend, it is the wedding festival of Nandikeswara, the sacred bull of Shiva on the Punarpoosa star during the Tamil month of "Panguni". The festival deity of Aiyarappar temple of Thiruvaiyaru is carried in a decorated glass palanquin along with the images of Nandikeswara and Suyasayambikai to the temples in Thirupazhanam, Thiruchottruthurai, Thiruvedhikudi, Thirukandiyur and Thirupoonthurthi. Each of the festival deities of the respective temples mounted in glass palanquins accompany Aiyarppar on the way to the final destiny, Thillaistanam. There is a grand display of fireworks in Cauvery riverbed outside Thillaistanam temple. The seven palanquins are carried to Aiyarappar temple in Thiruvaiyyaru.