Why listen to a man who has the sign of a man who corrupted christianity ... you people are so blind
This article is about the symbol. For the Japanese tank sometimes called Chi-Ro, see Type 89 I-Go. For the astrologer, see Cheiro.
The Chi-Rho symbol
The Chi Rho (/ˈkaɪ ˈroʊ/; also known as chrismon or sigla) is one of the earliest forms of christogram, formed by superimposing the first two (capital) letters—chi and rho (ΧΡ)—of the Greek word ΧΡΙΣΤΟΣ (Christos) in such a way that the vertical stroke of the rho intersects the center of the chi.
The Chi-Rho symbol was used by the Roman emperor Constantine I (r. 306–337) as part of a military standard (vexillum). Constantine's standard was known as the Labarum. Early symbols similar to the Chi Rho were the Staurogram (Christliche Symbolik (Menzel) I 193 2.jpg) and the IX monogram (Christliche Symbolik (Menzel) I 193 4.jpg).