Gregory of Nazianzus
Up to the year 1200, fourteen of its bishops are known. Its name is inseparably connected with its illustrious doctor and poet-bishop, St. Gregory of Nazianzus, who became bishop of Constantinople and Doctor of the Church. His father, Gregory of Nazianzus the Elder, had been a member of a Jewish-pagan sect called the Hypsistarians, but was converted to Christianity and became Bishop of Nazianzus.