Sree Poornathrayeesa Temple is one of the most prominent temples in Kerala. The presiding deity in the temple is Maha Vishnu, worshipped in the form of Santhanagopala Murthy - saviour of Infants. In the temple, Lord Vishnu is seen in a unique posture sitting under the shade of five caps of Anantha. Pilgrims can get a close look of the deity from a small window on the rear side of Sreekovil. Visitors can also pay a visit at the idol of Lord Ganapathi on the southern side of the shrine. Besides the idol of Lord Ganesha, no other Upadevatas are worshipped here.
In 1920, Sree Poornathrayeesa Temple was ruined due to fire accidents, but the idols were retracted safely. In 1921, the temple was reconstructed by Sri Eachara Warrier. You can read plenty of messages about God etched in the stone of the temple. The Gopuram on the west side of the temple is very old. It was built in the 11th and 13th centuries AD. Keda Vilakku is another prime attraction of here. According to the legends, Arjuna lit this lamp by using Gingelly oil. Hence the devotees use Gingelly oil to light the lamp in the temple.