John Chrysostom (347 - 407) was an eminent Christian clergyman, patriarch of Constantinople, considered by the Catholic Church one of the four great Fathers of the Eastern Church. The Greek Orthodox Church values ​​him as one of the greatest theologians and one of the three pillars of that Church, together with Basil the Great and Gregory Nazianzen.

This Father of the Church was famous for his public speeches and for his denunciation of the abuses of the imperial authorities and the licentious life of the Byzantine clergy. His confrontation with the court of Emperor Arcadio and his wife Elia Eudoxia resulted in his exile. Reinstalled in his episcopal headquarters temporarily, he was finally deposed and exiled until his death. A century later, Juan de Constantinopla received the title by which posterity knows him: Juan Crisóstomo. That term comes from the Greek, chrysostomos, and means 'mouth of gold' because of its extraordinary elocuenci
to which he consecrated him as the greatest speaker among the Greek Fathers.