dear swetha you have missed more than a point. a temple with a song about it is steeped in antiquity. but that does not certainly mean the structure is as old. one local example mylapore temples structure 1s only 300 years old but the poompaavai pathigam is around 1300 years old
very few if any temple looks the same at the time the saints sang about them
6-9th century the temples were adorned with the hymns the cholas in the footsteps of sembian mathevi then set about making them all katralli. then came the pandyas with t he images of fishes on the stone roofs. finally the vijayanagar empire. in the late 1800s and early 1900s the nagaraththars of chettinad took it upon themselves to renovate the temples and replace brick with stone. kalahsthi, thiruvannaamalai, a part of rameshwaram and madurai along with about a 100 temples ( saivaite ) are all a part of nagaraththaar thiruppani. reards venketesh