Guruvayoor is located 29 Kms North West to Thrissur Town. The ancient Mammiyur Temple is situated at a walkable distance of 200 metres north west to the famous Guruvayoor Sree Krishna Temple. The main deity is Lord Shiva in the form of Uma Maheswara. Lord Vishnu is also given equal importance in a sanctum sanctorum near to that of Lord Shiva. This is the only Temple where Lord Shiva and Lord Vishnu are worshipped in equal status in poojas, rituals, thanthripooja, Rigveda dhara, murajapa, festival processions and in all respects. The upadevas are Sree Parvathy, Vigneswara, Subrahmanian, Ayyappa, Brahmmarakshassu, Bhagavathy, Naga and Rakshassu. This is a prominent Temple among the 108 Shivalayas consecrated and regulated by Lord Parasurama, the mythical founder of Kerala.