Ashtamichira Mahadeva temple is located at Ashtamichira in Thrissur district, Kerala. This is one among the 108 Shiva temples in Kerala and three forms of Shiva are worshipped in the temple. The annual Shivratri festival, which falls on the last week of February or first fortnight of March, is an important occasion in the temple.
The three forms of Shiva worshipped at Ashtamichira Mahadeva temple are:
- Mrityunjaya Moorthy called Thekkum Thevar – this is a swayambhu Shivling (of divine origin).
- Parvathi Sametha Shiva called the Naduvil Thevar.
- Kirathamoorthy, called Vadakkum Thevar, is worshipped as a subsidiary deity.
The upa devatas worshipped in the temple are Ganapathi, Sastha, Goddess Bhadrakali, Nagas or serpents and Bhagavan Sri Krishna.
The shrine of Naduvil Thevar is a chathura sreekovil and it is two tier sanctum.
The sreekovil of Thekkum Thevar is a round sanctum or vatta sreekovil.
The temple has two entrances to the nalambalam. One sacrificial stone (Ballikallu) is placed outside the nalambalam and another one is inside in front of the Thekkum Thevar.