Theodosius, Patriarch of Antioch (887-896), Born at Takrit as Romanus, and became a monk and studied at the Monastery of Qartamin (Mor Gabriel). His Syriac style was majestic and he probably knew Greek too. He studied and mastered medicine and was considered a skillful physician.

He was consecrated patriarch of Antioch in 887 and ordained thirty-two metropolitans and bishops. He died at his monastery in 896.

His works are:

1. A lengthy commentary on Pseudo-Hierotheus, dedicated to Lazarus, bishop of Cyrus. He finished the first and the second treatises of this work at Amid, where he resided for a long time. The third treatise was finished at Samosata. There is an ancient imperfect copy of this magnificent work in the Zafaran's library in the handwriting of Abu Nasr Al-Bartelli, copied in 1290 and containing half of this commentary.

2. He wrote a treatise addressed to the deacon George, explaining the maxims and proverbs of philosophers, most of which he translated from Greek into Syriac. He also included in this treatise a collection of one hundred twelve Pythagorian maxims. It was published in both Syriac and Arabic.

3. He also wrote a medical syntagma (Kunosho/Kunnash) bearing his name, which was admired by Bar Hebraeus. This Kunosho is lost except for a fragment in the Vatican. He also wrote a Synodical epistle and a Lenten homily in Arabic.

(History of Syriac Literature and Sciences, Patriarch Ignatius Ephrem I Barsoum, Presseggiata Press, p 130)