Sergius of Reshaina was a physician and priest during the 6th century. He is best known for translating medical works from Greek to Syriac, which were eventually, during the Abbasid Caliphate of the late 8th- & 9th century, translated into Arabic. Reshaina, where he lived, is located about midway between the then intellectual centres of Edessa and Nisibis, in northern Mesopotamia.