Theodoret was the Melkite (Greek) patriarch of Antioch in the late 8th century and possibly into the 9th, during the reign of the Abbasid caliph Harun al-Rashid. The exact dates of his patriarchate are the subject of disagreement. Date ranges of c. 787–c. 799, 795–812 and c. 794–811 have been offered.