Theodore is thought to have been born during the third decade of the twelfth century in Constantinople. He was [[Hirotonie|hirotonit]] a [[diacon]] and appointed head of the law school in Constantinople with the title Nomophylax (Greek: Νομοφύλαξ, "Guardian of the Laws"). Under Patr. Theodosius I, he was charged with handling all ecclesiastical cases and trials submitted to the patriarchate in Constantinople from 1178 to 1183. In 1193, he was elected [[Patriarch]] of Antioch, but remained in Constantinople until his death in 1199.