Cosmas, surnamed Indicopleustes, or the Indian navigator, performed his voyage about the year 522, and composed at Alexandria, between 535, and 547. Christian Topography, (Montfaucon, Praefat. c. i.,) in which he refutes the impious opinion, that the earth is a globe; and Photius had read this work, (Cod. xxxvi. p. 9, 10,) which displays the prejudices of a monk, with the knowledge of a merchant; the most valuable part has been given in French and in Greek by Melchisedec Thevenot, (Relations Curieuses , part i.,) and the whole is since published in a splendid edition by Pere Montfaucon, (Nova Collectio Patrum , Paris, 1707, 2 vols. in fol., tom. ii. p. 113 - 346.) But the editor, a theologian, might blush at not discovering the Nestorian heresy of Cosmas, which has been detected by La Croz (Christianisme des Indes , tom. i. p. 40 - 56.)