The Colisvara temple is the smaller of the two shrines of the Avani-Kandrapa-Isvaram temple built at Kilaiyur under Aditya I (871-907 CE). The other one is the Agastisvara shrine. Colisvara is a double storied stone shrine. The crowning cupola (shikhara) is circular and bell-shaped with a fine finial (stupi) over it unlike the square shikhara and stupi of its twin shrine making this a unique feature of the Avani-Kandrapa-Isvaram temple at Kilaiyur.
References: S.R. Balasubrahmanyam, 1963, pp. 20-25, M. Boothalingam, 1971, 64-66
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