John the Apostle was one of the twelve apostles of Jesus Christ. He is also known as John the Theologian, and John the Divine.
According to the New Testament account, John the Apostle was the son of Zebedee and Salome, and the brother of James. They originally were fishermen and fished with their father in the Lake of Genesareth. He was first a disciple of John the Baptist, and later one of the twelve disciples of Jesus Christ. He is revered as a saint by all branches of Christianity that revere saints. The Roman Catholic Church commemorates him on December 27. The Eastern Orthodox Church commemorates him on September 26, and also remembers him on May 8, on which date Christians used to draw forth from his grave fine ashes which were effective for healing the sick.
John was traditionally held to be the author of five books of the New Testament, including the Gospel of John, but many scholars dispute this. Catholic/Orthodox tradition says that he and the Virgin Mary moved to Ephesus, where both eventually died. Many Evangelical and other scholars question this, especially due to the advanced age which Mary would have reached by this time. Some believe, however, that there is support for the idea that John did go to Ephesus and from there wrote the three epistles sometimes attributed to him. John was allegedly banished to the Greek island of Patmos, where some believe thathe wrote the Book of Revelation.
For a discussion of the problems in identifying the authorship of the Johannine works, see [1].
For more information on the author of the Gospel, see John the Evangelist.