Xp

From BiblePortal Wikipedia

Xp [1]

The first two letters of the Greek word XRISTOS, Christ; - an abbreviation used with the letters separate or, oftener, in a monogram, often inclosed in a circle, as a symbol or emblem of Christ. It use as an emblem was introduced by Constantine the Great, whence it is known as the Constantinian symbol, or monogram. See Labarum.

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