PRE-SALE: Defender of the Faith
By This Sign, Conquer.
The Chi Rho or Chi and Rho are the first two letters (ΧΡ) of "Christ" in Greek ΧΡΙΣΤΟΣ. (Christos). Sometimes it is called the Monogram of Christ or Chrismon or Labarum. While it was used very early by persecuted Christians in the catacombs, when Constantine The Great was struggling to become emperor, he used the symbol, he believed he saw in a vision in the sky, at the front of his armies and was victorious. This Symbol became part of a military standard (vexillum), Constantine's standard was known as the Labarum.