Thiruvanchikulam Siva Temple (medieval Thiruvanchaikkalam Temple is a Hindu temple situated in Kodungallur in Thrissur district in the South Indian state of Kerala in India. Constructed in the Kerala style of architecture, the temple is believed to have been built during the Chera period in the 8th century. Shiva is worshipped as Mahadeva and his consort Parvathi as Umadevi. The presiding deity is revered in the 7th century Tamil Saiva canonical work, the Tevaram, written by Tamil saint poets known as the Nayanmars and classified as Paadal Petra Sthalam, one of the 276 temples that find mention in the canon.It is the only temple in Kerala in the list. As per Periyapuranam, Sundara Murthi Nayanar,one of the four great saints in Tamil Shivism ascended to heaven from this place. The temple is open from 4 am - 12 pm and 4-8:30 pm on all days except during festival days when it is open the full day. Four daily rituals and three yearly festivals are held at the temple, of which the ten-day Vaikasipournami Brahmotsavam festival celebrated during the month of Edavam (May - June) in Malayalam calendar being the most prominent. The temple is maintained and administered by the Thiruvanchikulam Devaswom under the Cochin Devaswom Board.

This is the only Thevaram Paadal Petra Shiva sthalam in Kerala. Shiva is the family god of the Cochin Royal Family (Perumpadapu Swaroopam) after they came to power following the decline of Chera Empire). The temple has very good mural paintings and is a protected monument by the Archaeological Survey of India. The national anthem of erstwhile kingdom of Travancore, Vanchi Bhumi refers to the deity of this temple, the official deity of imperial Chera Empire from whom the former claim lineage. The temple has the oldest reference in history in Thevaram Hymns sung by Sundara Murthi Nayanar (also known as Sundarar in Tamil), one of the four Saiva Acharyas. The images of Sundara Murthi Nayanar, and of Cheraman Perumal Nayanar can also be seen in the temple premises.

It is one of the oldest Shiva temples in South India, where Shiva is said to live along with his whole family.It was from here, Sundara Murthi Nayanar reached Kailash by sitting on a white elephant, sent by Lord Shiva on Adi Swathi day (July/August). He was followed on horse back by Seraman Perumal Nayanar. On his way to Kailash, Sundara Murthi Nayanar sang a Padhigam which was sent back to Thiruvanchikulam on his request. The temple is associated with Chidambaram temple in Tamil Nadu. The capital city of the Kulasekharas, Mahodayapuram, was built around the temple; it was protected by high fortifications on all sides and had extensive pathways and palaces. This temple was attacked and damaged during Tipu Sultan's invasion of Kerala; the copper roofing, gold and jewels were looted. Tipu's Muslim soldiers fled the temple complex only after the arrival of the Travancore Army of Dalawa Keshavadas Pillai. The temple was rebuilt by Paliath Achan of Kochi/Perumpadappu Swaroopam.

The temple is built in Kerala style of architecture with entrance towers in all four sides. The sanctum occupies the centre portion of the temple, which is fortified. The sanctum is approached through a flagstaff, which is axial to the entrance tower and the sanctum. The flagstaff has images of Asthavidyesavara. The presiding deity is in the form of lingam. The image of Narasimha is sculpted on the vimana. The images of Sundarar and Ceramanperuman are maintained at Bhagavathi temple and brought to the temple during Svati festival during July - August. There are two temple tanks in the temple, located in the second precinct.  Source : Wikipedia

Trasnport

By Road: Kodungallur is well connected by KSRTC buses and private transport buses. The city is connected to Kochi (35 km), Thrissur (38 km) and Guruvayur (45 km). Tourist deluxe luxury buses are available from many cities including Chennai, Bangalore, Trivandrum and Kozhikode to Kodungallur.
By Train: The nearest railhead to Kodungallur is located at Iringalakuda, at a distance of 16 km away. Iringalakuda is well connected with other major railway stations. It is in the main route connecting Kochi and Palghat. Taxi services are available from railway station to Kodungallur at a fare of about Rs 300.
By Air: The nearest airport to Thiruvanchikulam Shiva Temple is at Nedumbassery International Airport at Kochi. It is at a distance 35 km away. Taxi services are available from Kochi to Kodungallur costing about Rs 500. Kochi airport is well connected to all major airports in India and also connected to many foreign cities. Direct flights are available to Chennai, Delhi, Mumbai and Bangalore.