Pope Stephen I (Latin: Stephanus I; died 2 August 257) was the Bishop of Rome of the Roman Catholic Church from 12 May 254 to his death in 257.
Of Roman birth but of Greek ancestry, he became bishop after serving as archdeacon of Pope Lucius I, who appointed Stephen his successor.
Stephen held that converts who had been baptized by splinter groups did not need re-baptism, while Cyprian and certain bishops of the Roman province of Africa held rebaptism necessary for admission to the Eucharist.
Stephen's view eventually won broad acceptance in the West, However, in the East this issue is still debated.