Ketheeswaram temple (Tamil: ???????????????? Tirukk?t?svaram) is an ancient Hindu temple in Mannar, Northern Province Sri Lanka. Overlooking the ancient period Tamil port towns of Manthai and Kudiramalai, the temple has lay in ruins, been restored, renovated and enlarged by various royals and devotees throughout its history. Tirukk?t?svaram is one of five Ishvarams dedicated to the Hindu deity Shiva and is venerated by Shaivas throughout the continent. Throughout its history, the temple has been administered and frequented by Sri Lankan Hindu Tamils. Its famous tank, the Palavi tank, is of ancient antiquity and was restored from the ruins. Tirukk?t?svaram is one of the 275 Paadal Petra Sthalams of Shiva glorified in the poems of the Tevaram.