John the Evangelist is a saint, one of the twelve apostles, and the youngest disciple of Jesus Christ. He is the author of the Fourth Gospel of the New Testament and the Apocalypse, and he raised the idea of Christ’s deity. After Jesus’ death, he did apostolic work and followed the Apostle Peter. It is said that wishing to test the apostle’s faith, the priest of the Temple of Diana gave him a poisoned chalice, but the poison escaped in the shape of a serpent.
John the Evangelist is depicted as young, with a rather feminine face, no beard, wearing long wide clothes, with a book symbolising his writings, and sometimes with a chalice symbolising the Christian faith and a serpent escaping from it symbolising Satan.