Christianity is a very unique religion in that although it contains all the basics of any religion, it can be described in a way that makes sense to anybody. Jesus Christ is the central figure in Christianity. The life of Jesus Christ is told to us through the Gospels of the Old and New Testaments. Initiation into the Christian church is a very easy process.
Baptism cleanses the baby of original sin.
Jerusalem is the center of Christianity. St. Augustine shaped Christianity more than any other person except Jesus of course. When Emperor Constantine converted to Christianity, he assured the church a place in society. He built a Christian Empire.