Edited sentence: E only.Many hymns written by alwrs are missing and many have changes incorporated in them.There are controversies however, since many feel that the chitrakootam originally referenced to by alwars could have been the one at UP where Rama spent time in ashrams of sages like viswamitra and atri.This apart some sources hold the founding of thillai chitrakootam to 1400 or probably 1600.This is because the currently available versions of works of alwars were copied and re-written centuries after the time of alwars sometime during late medieval ages