This collection of six substantial articles constitutes the fourth volume in the subseries Chrétiens en terre d'Iran, where ‘Iran’ represents the geographical area of the Sasanian Empire, much wider that that of modern Iran. As is often the case in such collective volumes the contents cover a wide range of subjects and of time: though most topics belong to the second half of the first millennium ad, the last chapter jumps to the early nineteenth century, while the geographical area remains the same. After a short essay by the editor, the first three contributions deal with matters of Syriac concern. P. Bruns provides a short introduction to, and German translation of, the legendary martyrdom of a popular Syriac saint of Iraq, Behnam, said to have been martyred, along with his sister Sara, both converts from Zoroastrianism, in 352 at the hands of their father, Sennacherib ‘king of Nimrud’. The legend is closely linked to two famous monasteries in Iraq, both still in existence, Mar Mattai and Mar Behnam, and much concerning the circumstances of, and background to, the legend's emergence still awaits unravelling. Jullien examines the strategies behind the extensive missionary activities of monks of the two rival Syriac communities, Syrian Orthodox and Church of the East, in the sixth and seventh centuries, a period of astonishing monastic expansion, above all in the Church of the East. The third contribution on matters of Syriac interest moves on to the late eighth and early ninth century, and is by V. Berti, who provides a very instructive study of the missionary ideology and politics of the famous patriarch of the Church of the East, Timothy i, thanks to whose collection of letters a great deal can be learnt about this subject. The last three contributions are much more disparate in character, though all of interest in themselves. Various earlier missions to the northern Caucasian people known as the Honk’ are recorded, but that by a bishop Israyel in 682 has provided the most detailed account of such a mission, to be found in the Armenian ‘History of the (Caucasian) Albanians’. The background to, and circumstances surrounding, this mission are illuminatingly studied by M. Bais. Numerous traditions concerning Zoroaster are to be found in Eastern Christian sources, and A. M. Schilling provides an edition, translation and study of one that has not hitherto been published, being found in the unedited first part of the World History of the thirteenth-century Coptic author al-Makin. In the course of his contribution Schilling skilfully sorts out the various strands that make up al-Makin's account. The final contribution, by A. M. Piemontese and using archival materials, moves on to the early nineteenth century and the intriguing career of the Catholic missionary priest, Leopoldo Sebastiani, whose translation of the Greek Gospels into Persian was published in Calcutta in 1813, remarkably, in collaboration with the British and Foreign Bible Society.