Four evangelists

In Christian tradition, the Four Evangelists are Matthew, Mark, Luke, and John, the authors attributed with the creation of the four Gospel accounts in the New Testament that bear the following titles: Gospel according to Matthew; Gospel according to Mark; Gospel according to Luke and Gospel according to John.

The gospels of Matthew, Mark, and Luke are known as the Synoptic Gospels, because they include many of the same stories, often in the same sequence. While the periods to which the gospels are usually dated suggest otherwise, convention traditionally holds that the authors were two of the Twelve Apostles of Jesus, John and Matthew, as well as two "apostolic men," Mark and Luke:

They are called evangelists, a word meaning "people who proclaim good news," because their books aim to tell the "good news" ("gospel") of Jesus.

In iconography, the evangelists often appear in Evangelist portraits derived from classical tradition, and are also frequently represented by the symbols which originate from the four "living creatures" that draw the throne-chariot of God, the Merkabah, in the vision in the Book of Ezekiel (Chapter 1) reflected in the Book of Revelation (4.6-9ff), though neither source links the creatures to the Evangelists. Images normally, but not invariably, appear with wings like angels. The meanings accruing to the symbols grew over centuries, with an early formulation by Jerome, and were fully expressed by Rabanus Maurus, who set out three layers of meaning for the beasts, as representing firstly the Evangelists, secondly the nature of Christ, and thirdly the virtues required of a Christian for salvation: These animals may have originally been seen as representing the highest forms of the various types of animals, i.e., man, the king of creation as the image of the creator; the lion as the king of beasts of prey (meat-eating); the ox as the king of domesticated animals (grass-eating) and the eagle as the king of the birds.

...
Wikipedia