3rd century BCE. Religion Shaivism, Vaishnavism, Dravidian folk religion, Jains, and Buddhists have coexisted in Tamil country for at least as early as the second century BCE. Economy Agriculture Industry See also Sources of ancient Tamil history Chronology of Tamil history History of Tamil Nadu History of Kerala Notes References Sources Printed sources Ancient Tamil Nadu 1st-millennium BC establishments in India Regions of Asia Regions of Karnataka Historical regions