Theodore of Sykeon was a Byzantine monk and metropolitan who lived in Galatia during the late 6th and early 7th centuries. Born in the village of Sykeon, he spent much of his youth in ascetic seclusion before being ordained as a priest at eighteen. He eventually served as the Bishop of Anastasioupolis. Known as a thaumaturge, he was noted for his prophetic abilities, including predicting the death of Emperor Maurice and the hardships that followed. He died on 22 April 613.