The chi-rho symbol is a Christian monogram consisting of the letters 'Χ' (chi) and 'Ρ' (rho), which are the first two letters of the Greek word for Christ, 'Χριστός'. This symbol emerged in early Christianity and became a significant representation of Jesus Christ, often used in art and architecture during the Late Antique period. The chi-rho not only served as a visual shorthand for Christ but also symbolized the triumph of Christianity over paganism during the rise of the church in the Roman Empire.