Christian apologist, born at Flavia Neapolis, about A.D. 100, converted to Christianity about A.D. 130, taught and defended the Christian religion in Asia Minor and at Rome, where he suffered martyrdom about the year 165. Two “Apologies” bearing his name and his “Dialogue with the Jew Tryphon” have come down to us. Leo XIII had a Mass and an Office composed in his honour and set his feast for 14 April.