Cosmas Indicopleustes was a merchant and later hermit from Alexandria in Egypt. He was a 6th-century traveller who made several voyages to India during the reign of emperor Justinian. His work Christian Topography contained some of the earliest and most famous world maps. Cosmas was a pupil of the East Syriac Patriarch Aba I and was himself a follower of the Church of the East.

The Christian Topography is a 6th-century work, one of the earliest essays in scientific geography written by a Christian author. It originally consisted of five books written by Cosmas Indicopleustes and expanded to ten and eventually to twelve books at around 550 AD.