Periya pirattiyar, who takes the hamsam (resemblance) of parashakthi is found here by helping Emperumaan Deepa Prakasar. The Emperuman stands here, there by taking away the darkness and explaining about the aathmas and the darkness is taken away by his Gnana Oli (Oli means light) and giving seva in Nidnra Kolam.Without understanding about the Jeevathma and paramathama, the Knowledge we get will be fully surround by darkness. Since the Perumal gave light, the Perumal is called as "Vilakku Oli Perumal".Deepam means light and Prakasam is said as the flash referred to as the light of spread out to take away the darkness. Since, the darkness was taken away, the Perumal there is called as "Deepaprakasar". There are shrines for Acharya Sri Ramanuja and Saint Nammalwar the author of Tiruvaimozhi praised as. This is one of the 108 Divya Desas of Lord Vishnu and enjoys the Mangalasasanam of Tirumangai Azhwar. Of the 108 temples, 105 are in India, one is in Nepal, and last two are outside the Earthly realms.The last two are Thirupalkaddal and Paramapadam. This temple is located in Woraiyur, Trichy. Divya means premium and Desam indicates place (temple). At that time, Sriman Narayanan appeared there as a "Light" and thereby getting the light to the yagam and ride away the darkness. Divya desam Temples are the 108 Vishnu temples that are mentioned in the works of the Tamil Azhvars (saints).The Asuraas stopped the light by covering the sky, there by covering the light and spread the darkness. To do the Yaagam, Light is the primary thing. But, Lord Saraswathi, who was motivated by Asuraas (Demons) to stop that Yaagam. Most significantly, this Divya Desam was the hallowed birthplace of the great Sri Vaishnava AchArya, Swami Vedantha Desikar (1268-1369 AD). Lord Brahmadevan wanted to do the Aswamedha Yaagam in Kanchipuram. About Temple:Thiru Thanka or Thoopul is 15th of the 108 divya desam temples situated in Kanchipuram, this temple is just ½ kms away from Ashtabuyakaram Temple of Lord Vishnu.About Temple:Thiru Thanka or Thoopul is 15th of the 108 divya desam temples situated in Kanchipuram, this temple is just ½ kms away from Ashtabuyakaram Temple of Lord Vishnu.