Chi Rho Pendant

A historical symbol associated with the Christian Faith; it was popularized by Constantine and became known as the symbol of Christian warriors.

History: "According to the historian Eusebius, Constantine received a heavenly vision while praying.

[W]hile he was thus praying … a most marvelous sign appeared to him from heaven … when the day was already beginning to decline, he saw with his own eyes the trophy of a cross of light in the heavens, above the sun, and bearing the inscription, CONQUER BY THIS. At this sight he himself was struck with amazement, and his whole army also, which followed him on this expedition, and witnessed the miracle.

What’s interesting is how the miracle was not private, but witnessed by his entire army. Constantine even swore an oath regarding the account of the event. Even more so, at this time Constantine had not yet been instructed in the Christian faith and this event spurred him into deeper studies of Christianity.

The vision was confirmed that same night when Jesus appeared to Constantine and “commanded him to make a likeness of that sign which he had seen in the heavens, and to use it as a safeguard in all engagements with his enemies.”"

*History found on Aleteia.com