Thripperumthura Mahadeva Temple is located at Chennithala near Mavelikara in Alappuzha district, Kerala. The 11-day festival is observed in such a manner that the 10th day falls on Thiruvathira Nakshatra in Dhanu month.
It is believed that one year the temple was unable to perform Arattu on the 10th day of the festival due to the war between Kayamkulam kingdom and Travancore. From that day onwards the festival ends on the 11th day instead of the usual 10th day.
The temple is dedicated to Lord Shiva. The sreekovil in the temple is round in shape and the deity faces east. On the Westside of the sanctum sanctorum is the temple dedicated to Goddess Parvati. It is believed that the murti in the temple was installed by Khara Maharshi. It is said that the Goddess Parvati murti in the shrine was consecrated by Vilwamangalam Swamiyar in 1425 CE to lessen the ferocity of Mahadev Shiva in the shrine.
The Upa Devatas worshipped in the temple are Ganapathy and Dakshinamurti. The temple is noted for sculptures on granite.
Some scholars are of the view that Manikkavacakar visited the temple during the 9th century CE and had darshan of Bhagavan here. The temple of Goddess Parvati is located in the spot.
There is also a belief that there used to a port in the area during ancient times and the place gets its name Thripperumthura from the port.