What should you kw about Christianity? Christianity is the world's largest religion with over two billion followers. As a creed based religion, the central beliefs are that Jesus was the Son of God, divine and human and the Messiah who was predicted in the Hebrew Bible by the prophets. Christians believe that Heaven and Hell exist in the life after death, and that only those who believe in Jesus and follow his teachings will go to Heaven. Christians believe that after life on earth, Jesus ascended into heaven, where he reigns with God the Father and the Holy Spirit, completing the Trinity. Christians are concentrated in Europe, the Americas, and Africa. Over the centuries, Christianity was identified with the culture of Europe, so that it was sometimes referred to as Christendom. As Christianity has expanded beyond Europe over the centuries, Latin America w has the largest Christian population in the world.