As per a legend, the original structure extended up to seven compounds and 13 miles leading to the seashore. The ruling Chola ruler, was against Vaishnavism and wanted to destroy the temple. An ardent devotee pleaded to Vishnu to appear and destroy the ruler. Vishnu was unmoved and in anger, the devotee threw a discus at the image, creating a scar. It is believed that the scar is seen in the image even during modern times. The presiding deity threw a discus to hurl the Chola forces. The image of the presiding deity is depicted hurling a discus.