The great wonderworker saint Theodore, who was a Greek by birth, was the first Bishop of Rostov. He was consecrated as a bishop around the year 991. At that time, most of the Rostov territory was still pagan, and Theodore worked tirelessly to proclaim the Gospel to the people of that area.
The inhabitants subjected the hierarch to many insults, and they even drove him away on one occasion. Then Theodore moved to Suzdal, where he brought many souls to Christ. He fell asleep in the Lord at Suzdal in 1023, resting from his fruitful apostolic labors. His holy relics are in Suzdal's Nativity of the Most Holy Theotokos Cathedral.
Portions of his holy relics are also kept in two other churches at Suzdal: that of the Kazan Icon, and that of Saints Constantine and Helen.
Father Aleksey - your friendly Singac priest