Ancient India was the single greatest trading partner of the Roman Empire. For centuries, Indian sailors navigated the Indian Ocean and Red Sea to bring goods, ideas and religious beliefs to the Greco-Roman ports based on the Egyptian coast. But how did this lucrative trade begin? And what sorts of goods passed along it?

In today's episode of The Ancients, Tristan Hughes is joined by William Dalrymple to explore 'The Golden Road' - one of the great trade routes of ancient history - and discover how India became the beating heart of the ancient world.

Presented by Tristan Hughes. Edited by Aidan Lonergan. The producer is Joseph Knight, the senior producer is Anne-Marie Luff.

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