Perhaps no more industrious compiler of knowledge ever lived. Simple and uncritical in his modes of thought, and apparently devoid of any striking originality, he collected in his numerous and elaborate treatises the results of such research in theology, philosophy, science and history as was in his time possible in Syria. Most of his works were written in Syriac, but some few in Arabic, which had long before his time supplanted Syriac as a living speech.
The son of a physician of Jewish descent, Bar-Hebraeus was born at Malatiah on the upper Euphrates. His youth was passed in the troublous times of the Mongol advance into western Asia, and his father eventually retired to Antioch, where Bar-Hebraeus completed his education. In 1246 he was ordained at Tripoliss as Jacobite bishop of Gubgs near Malatia, and a year later was transferred to the neighbouring diocese of Lal~abhin, whence in 1253 he passed to be bishop of Aleppo. Deposed almost immediately by an ecclesiastical superior on account of disputes about the patriarchate, he was restored to his see in 1258, and in 1264 was promoted by the patriarch Ignatius III David to be maphrian, the next rank below that of patriarchan office which he held till his death at Maragha. He seems to have been a model of devotion to his ecclesiastical duties and to have won the respect of all parties in his diocese.
It is mainly as an historian that Bar-Hebraeus interests the modern student. His great historical work the Syriac Chronicle is made up of three parts. The first is a history of secular events from the Creation to his own time, and in its later portions gives valuable information regarding the history of south-east Europe and western Asia. A compendium in Arabic of this secular history was made by Bar-Hebraeus under the title al-Mukhta~arfid-Duwal (Compendious History of the Dynasties). The second and third parts of the Chronicle deal with the history of the Church, the second being mainly concerned with the patriarchate of Antioch, and the third with the eastern branch of the Syrian Church. Of special value to theologians is the Aucar Raze (Storehouse of Secrets), a critical and doctrinal commentary on the text of the Scriptures. Of this many portions have been edited by various scholars, and a valuable study of the work, together with a biography and estimate of its author, has been published by J Gottsberger (Barhebräus und seine Scholien zur heiligen Schrift, Freiburg i. B., 1900).
A full list of Bar-Hebraeus's other works, and of editions of such of them as have been published, will be found in W Wright's Syriac Literature, pp. 268-281. The more important of them are: