Vadakkumnathan Temple is one of the largest temples in Kerala that is dedicated to Lord Shiva. This temple is over a 1000 years old and a classic example of the Kerala style of architecture with beautiful murals of the seventeenth century delineating graphically the story of Mahabharata. The murals in the temple are known for its rarity and two of them - Vasukisayana and Nrithanatha - are even worshipped regularly. The shrines and the Koothambalam display exquisite vignettes carved in wood. It is believed that this temple was built by Parasurama. The sprawling Thekkinkadu maidan , en circling the Vadakumnathan temple, is the main venue of the Thrissur Pooram. Vadakkunnathan temple is surrounded by a massive stone wall enclosing an area of nearly 8-9 acres. Outside the nalambalam, there are shrines for Lord Krishna, Vrishabha, Parasurama, Simhodara, Dharmasastha and Adi Sankaracharya.