the corpus of temple literary works, the Vyagrapura Mahatmya is quite exhaustive
and gives elaborate accounts of the temple growth right from the date of Khara's
entrusting the Sivalinga to Vyagrapada. Historical evidence starts from the 11th
century and is embodied in several inscriptions and architectural styles.
carvings on walls and ceilings, despite narrating prominent puranic episodes,
they help in fixing the periods of construction. The Vaikom Temple Entry
Movement that brought out a great revolution also throws sufficient light on the
dates and facts of the temple - construction, destruction and renovation.