Saints Peter and Paul were bishops at Nicea. Saint Peter defended the Orthodox Faith against the iconoclasts during the reign of Leo the Isaurian (813-820) and endured suffering for this. He died no earlier than the year 823.
Four Letters of Saint Theodore the Studite to Saint Peter are known, written between the years 816-823. No account about the life of Saint Paul of Nicea has been preserved. His name is first mentioned in the so-called “Petrine” Greek Prologue of the eleventh century.