The earliest, and a very famous, Syriac historian. He was born at Amida (Diarbekir, on the upper Tigris), about 505; d. about 585. In 529 he was ordained deacon in St. John's monastery of the same city, but on account of his monophysitic doctrine was soon obliged to take refuge in Palestine, where we find him in 534; thence he came to Constantinople, driven from Palestine by the great pestilence of 534-7. In the capital he found a friend in Jacob Baradaeus, the organizer of the Jacobite Church; a protector in Justinian; and a life-long collaborator in a certain Deuterius. The emperor placed him at the head of the Monophysite community of Constantinople, and soon entrusted him with the mission of converting the heathens of Asia proper and the neighbouring provinces. Eventually John was consecrated (by Jacob Baradaeus), Bishop of Ephesus, the heart of the Monophysite territory, but his official residence, it seems, was always Constantinople. In 546 he helped Justinian to search out and quash the secret practice of idolatry in the capital and its surroundings. Hence his beloved titles of "Teacher of the Heathens", and "Idol-breaker." Soon after Justinian's death (565), John's fortunes began to decline. When the persecution broke out in 571 he was one of its very first victims, and had to suffer imprisonment, banishment, and all sorts of vexations at the hands of the orthodox patriarchs. He soon resigned, in favour of Deuterius, his position as head of the communities he had converted from heathenism, and consecrated Deuterius Bishop of Caria. We do not know where nor exactly when he died, it must have been shortly after 585, for his history comes to an end with that year, and he was then about eighty years of age.

His principal work was an "Ecclesiastical History", from Julius Caesar to A.D. 585. It was divided into three parts of six books each. The first part has entirely perished; of the second part we have copious excerpts in two manuscripts in the British Museum, and possibly the whole of it in the third part of the "Chronicle" of Denys of Tell-Mahre. These excerpts have been edited by Land (Anecdota Syriaca; Leyden, 1868, II, 289-329, 385-390), and translated into Latin by von Douwen and Land (Joannis Episcopi Ephesi, Syri Monophysitae Commentarii de Beatis Orientalibus et Historia Ecclesiasticae fragmenta, Amsterdam, 1889). The third part, which opens with the beginning of the persecution under Justin II (571), has come down to us, though not without some important gaps. There is an edition of it by Cureton (The Third Part of the Ecclesiastical History of John, Bishop of Ephesus, Oxford, 1853), also two translations, one English by Payne Smith (1860), and another in German by Schonfelder (1862). John of Ephesus is also the author of the "Biographies of the Eastern Saints", written at different times and gathered into a "corpus" about 569. They were published by Land (op. et loc. cit., pp. 2-228), and done into Latin by von Douwen and Land (ibid.). Both works are of the greatest importance for the history of the writer's times. He evidently strove to be impartial, for which he is very much to be commended, considering the part he played in the events he related; he is also accurate and full of details. The troubled times in which he wrote the third part of the "History" and his unsettled condition during that period of his life easily explain the disorder and repetitions to be found in the last six books. They account also for the style, which is rude, entangled, and abounds with Greek words and phrases; besides, we must not overlook the fact that the water spent most of his life outside the zone of spoken Syriac.

ASSEMANI, Bibl. orient. Vatic. (Rome, 1721) II, 83-90; DUCHESNE, Memoire lu a l'Academie des Inscriptions et Belles-Lettres (Paris, 25 Oct., 1892); NAU, Analyse des Parties inedites de la chronique attribuee a Denys de Tell-Mahre (Paris, 1898), reprint from Supplement trimestriel de l'Orient Chretien (Paris, April, 1897) IDEM, Analyse de la Seconde partie inedite de l'histoire ecclesiastique de Jean d'Asie in Revue de l'Orient Chretien, II (Paris, 1897), 455-493; LAND, Johannes Bischof von Ephesos (Leyden, 1856); DUVAL, Litterature Syriaque {Paris, 1907), 181-184, 362-363; WRIGHT, A Short History of Syriac Literature (London, 1894), 102-107; SCHONFELDER in Kirchenlex., s. v. Johonnes von Ephesus.

H. HYVERNAT