In spite of the texts agreement, it is difficult to reconstruct the disciples experience, according to Scripture scholars, because the Gospels draw heavily on Old Testament descriptions of the Sinai encounter with God and prophetic visions of the Son of Man. Certainly Peter, James and John had a glimpse of Jesus divinity strong enough to strike fear into their hearts. Such an experience defies description, so they drew on familiar religious language to describe it. And certainly Jesus warned them that his glory and his suffering were to be inextricably connecteda theme John highlights throughout his Gospel.
Tradition names Mt. Tabor as the site of the revelation. A church first raised there in the fourth century was dedicated on August 6. A feast in honor of the Transfiguration was celebrated in the Eastern Church from about that time. Western observance began in some localities about the eighth century.
On July 22, 1456, Crusaders defeated the Turks at Belgrade. News of the victory reached Rome on August 6, and Pope Callistus III placed the feast on the Roman calendar the following year.