This Siva temple is believed to be one of the 108 Siva temples consecrated by Lord Parasurama in Kerala. Though it is a Siva temple, it is known as Adat Vishnu temple also. There are two sancta with Siva and Maha Vishnu consecrated with equal importance. Lord Siva is facing the east while Lord Vishnu is facing the west. The legend about this temple starts with one of the Namboothiris of Kuroor mana, who was a teacher of the Vedas, marrying Gouri Antharjanam from Purayanoor mana who was an ardent devotee of Lord Maha Vishnu. The couple had no children and soon the Namboothiri also passed more away. The relatives left the Antharjanam there and moved to a place called Adat. The Antharjanam continued to stay there with a maid named Gouri and her son Madhavan. One day a handsome young boy came to her house with Madhavan and continued to stay there doing odd jobs. One day Vilwamangalam Swamiyar happened to come to that house. All the flowers that Swamiyar showered to worship Lord Vishnu, were seen to fall at the boy’s feet. Thus, he and those in that house realised that the boy was Lord Vishnu. Later they too shifted residence to Adat. There is a legend connected with the place getting the name Adat. Once Kurooramma was preparing the naivedyam for Lord Guruvayoorappa. A boy came to help her. But before Vilwamangalam Swamiyar had come to perform the pooja, the boy ate some part of the naivedyam. As a punishment, Kurooramma kept the boy under a vessel. Later she came to realise that the boy was Lord Guruvayoorappan. As he had been kept closed (adachch in Malayalam) under a vessel, the place came to be associated with it and known as Adat.