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.[1] 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, James, and John.[2]
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. Justus bishop of Jerusalem. He was baptized and ordained a deacon. His two-year episcopacy was one under which the church was persecuted.
John I died April 11, after serving two years in office.[3]