Kalpathy Viswanatha Swamy temple is the oldest Siva temple in Malabar. H. Kombi Achan, then Raja of Palakkad, built it in 1425 A.D. Kalpathy is linked to Kasi, because the main diety is Siva and the temple is on the banks of the Neela Nadhi just as Kasi is on the banks of the Ganges. The other deities consecrated in the temple are Sri visalakshi Sametha Viswanatha Swamy, Vinayaka, Valli Devayani Sametha Subramanya Swamy, Gangadhara, dakshinayana Murthy, Simhanasundari, Nataraja, Surya Bhavara, Kala Bhairavan, Chandikeswaran, Nandeeswaran and Pradesh Handi. The rituals in the temples were conducted earlier by Kerala Brahmins, the Nambudiries. But now, Tamil Brahmins are in charge. The centre of attraction of the festival is Kalpathy Sri Viswanatha Swamy temple. The festival is celebrated in the month of November. On the seventh day (28th day of Alpasi), the diety from Viswanatha Swamy temple is taken out and installed in the chariot. There are three chariots in this temple; one for the main dioety Shri Viswanatha Swamy and Goddess Parvathy, the second for Visweswara and the third for Lord Subramanya Swamy.