John I (bishop of Jerusalem) John I (bishop of Jerusalem) John I of Jerusalem was the seventh Bishop of Jerusalem. He was, according to Eusebius, a Jewish Christian born to Jewish parents who kept the Law of the Torah. According to universal tradition, John I replaced the first bishop of Jerusalem Saint James the Just, the ""brother of the Lord,"" who was appointed bishop by the Apostles Peter, St. James (whom Eusebius identifies as James, son of Zebedee) and John. John was well versed in the Law of Moses and as a young man disputed with Christians until he converted with the instruction of St.
James, brother of Jesus bishop of Jerusalem by Peter, James (the Greater) and John: Clement, in the seventh book of the same work, relates also the following concerning him: According to Eusebius (3rd/4th century) James was named a bishop of Jerusalem by the apostles: "James, the brother of the Lord, to whom the episcopal seat at Jerusalem had been entrusted by the apostles". Jerome wrote the same: "James... after our Lord's passion... ordained by the apostles bishop of Jerusalem..." and that James "ruled the church of Jerusalem thirty years". Epiphanius (4th century) , bishop of Salamis, wrote in his work "The Panarion" (AD 374-375)