He was a Syrian from Homs. According to Irenaeus, it was during his pontificate that the aged Polycarp, a disciple of Saint John the Evangelist, visited the Roman Church.
154-167- He was Bishop of Rome.
– He was the first Roman Bishop to condemn heresy by forbidding Montanism. He also actively opposed the Gnostics and Marcionism. According to Liber Pontificalis, he decreed that priests are not allowed to have long hair (perhaps because the Gnostics wore long hair).
167 – He is reported to have suffered martyrdom.
– Died on the 17th of April in Rome, Italy.