The cross symbol is the oldest and may have many mysterious meanings. The cross is a universal symbol that has existed since ancient times and represents the sun. The sun god of Babylon, as the most important symbol of the sun god; Usually forms a sun gear with the circumscribed circle. In addition, the cross also symbolizes the tree of life and is a symbol of reproduction. Vertical bars represent men and horizontal bars represent women. Horizontal represents yin and vertical represents yang, which is also a sign of fornication. This cross appears in Mexico, Peru and, most importantly, Central America, implying four kinds of winds, which are the sources of rain. There is a connection between the cross and the crucifixion of Christ.
Nevertheless, it cannot be used as a symbol of early Christianity. The first church never appeared. The cross was introduced to the Christian church in 43 1 year and was erected at the top of the church in 586.