These are 108 sites (including 106 earthly temples, plus Tirupparkadal – the ocean of milk; and Paramapadam / Vaikuntam – the abode of Lord Vishnu) at or about which Vaishnava Bhakti poets and saints (known as azhvars) have sung or performed Mangalasasanam. There are 12 azhvars, but there is no temple where all 12 of them have sung. The Sarngapani temple in Kumbakonam is the one where the most number of azhvars – eleven – have sung at.
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TN Temples Project 