The Chi-Rho is a Christian symbol consisting of the intersection of the capital Greek letters Chi (Χ) and Rho (Ρ), which are the first two letters of "Christ" in Greek (ΧΡΙΣΤΟΣ, Christos). The Chi-Rho can represent either Christ or Christianity and is also known as a Christogram.
The church historian Eusebius, who spoke with the emperor about his experience, described the standard:
"On the top of the whole was fixed a wreath of gold and precious stones, and within this the symbol of the Saviour's name, two letters indicating the name of Christ by means of the initial letters, the letter X intersection P at the center."
The Chi-Rho was used by Christians before Constantine but it became much more widespread after he adopted it. The chi-rho appeared on the coins of Constantine and his Christian successors, sometimes alone and sometimes as part of a military standard as described by Eusebius. It continues to be widely used today.
Christianity developed out of Judaism in the 1st century C.E. It is founded on the life, teachings, death, and resurrection of Jesus Christ, and those who follow him are called "Christians." Christianity has many different branches and forms with accompanying variety in beliefs and practices. The three major branches of Christianity are Roman Catholicism, Eastern Orthodoxy, and Protestantism, with numerous subcategories within each of these branches. Until the latter part of the 20th century, most adherents of Christianity were in the West, though it has spread to every continent and is now the largest religion in the world. Traditional Christian beliefs include the belief in the one and only true God, who is one being and exists as Father, Son, and Holy Spirit, and the belief that Jesus is the divine and human Messiah sent to the save the world. Christianity is also noted for its emphasis on faith in Christ as the primary component of religion. The sacred text of Christianity is the Bible, including both the Hebrew scriptures (also known as the Old Testament) and the New Testament. Central to Christian practice is the gathering at churches for worship, fellowship, and study, and engagement with the world through evangelism and social action.
1. God created all that is seen and unseen
2. Jesus is the Son of God and is one with God
3. Jesus was conceived of the Holy Spirit and born of the virgin Mary
4. Jesus suffered and was crucified
5. Jesus died and was buried
6. Jesus rose again (the Resurrection)
7. Jesus ascended into Heaven
8. Jesus will return to judge the living and the dead
9. Anyone can have salvation
10. People who repent of their sins will be forgiven