Lahiri Bundar is an 11th century port located in the lower Indus Delta in Sindh in modern Pakistan. Through the centuries, it has been an important trading port for the region, connecting Central Asia and the hinterlands of the Indus river to the trade networks of the Indian Ocean. Ships from Arabia, Persia, and the Ottoman Empire brought goods to the port to be taken to the city of Thatta and further inland. The port eventually declined in the 18th century as gradual sedimentation due to riverine alluvial flows made its harbours and anchorages unusable.