Chidambaram is a town and municipality in Cuddalore district in the Indian state of Tamil Nadu. It is the taluk headquarters of the Chidambaram taluk. The town is believed to be of significant antiquity and has been ruled, at different times, by the Medieval Cholas, Later Cholas, Later Pandyas, Vijayanagar Empire, Marathas and the British. The town is known for the Thillai Nataraja Temple, and the annual chariot festival held in the month of December-January (Tamil month Marghazhi).