St. Theodore of Tarsus, Greek monk who became Archbishop of Canterbury.
St. Theodore was a Greek monk born at Tarsus in Cilicia who was living in Rome when, in 668, he was consecrated Archbishop of Canterbury at an advanced age. He organized the dioceses of England, founded a school at Canterbury where Greek and Latin learning flourished, and united the English Church under one order.
He reposed in 690 and is commemorated on September 19.
Feast day
On the New Calendar, Theodore of Tarsus, Archbishop of Canterbury is commemorated on September 19. Churches on the Old (Julian) Calendar keep the feast on October 2 of the civil calendar.
Also commemorated on September 19

Theodore of Smolensk and his sons David and Constantine
Saint, Θεόδωρος, Δαβίδ και Κωνσταντίνος
Holy Prince Theodore of Smolensk and Yaroslavl and his sons David and Constantine.
Zosimas the Hermit of Cilicia
Venerable, Ζωσιμάς ο Ερημίτης
Venerable Zosimas the hermit of Cilicia, who lived at peace with the wild beasts.