Tirunavaya (Navayogipuram on Brhannadi in Kerala Mahatmya) seems to be a very sacred place for the Hindus of Kerala from time immemorial. Perar at Tirunavaya is considered to assume a special sanctity, because it flows between the temple of god Vishnu (Nava Mukunda) on its right bank and temples of Brahma and Siva on its left. Tirunavaya, on the fertile Perar basin, must have been one of the earliest Brahmin settlement in Kerala. Perar also acts as the main artery of communication with the interior Kerala lands, otherwise inaccessible due to the thick vegetation, in the rainy season. Rivers and backwaters in Kerala afforded the easiest and cheapest and almost only means of communication in times when wheeled traffic and pack-bullock traffic were unknown. And accordingly it is found that the Brahmins settled most thickly close to or on the rivers and selected sites for their settlements so as to command as much as possible of these arteries of traffic.