Christianity is a major world religion that is based on the life and teachings of Jesus Christ. It is the largest religion in the world, with more than 2.3 billion followers. Christians believe that Jesus is the Son of God and the savior of humanity whose coming as the Messiah was prophesied in the Old Testament.

The central teachings of Christianity are that Jesus is the Son of God, that he died for the sins of humanity, and that he rose from the dead and ascended into heaven. The Bible is the primary source of Christian teachings, and it is divided into two sections: the Old Testament, which consists of the Hebrew Bible, and the New Testament, which tells the story of Jesus' life, death, and resurrection.

The Christian faith is based on the belief in one God, who is the creator and sustainer of all things. This God is revealed to humanity in three persons: the Father, the Son, and the Holy Spirit. Christians believe that Jesus is the incarnation of God and that through his death and resurrection, he opened the way for people to be reconciled to God and to receive salvation.

In addition to its core beliefs, Christianity is also characterized by a variety of practices and traditions. These include prayer, attending church services, observing holy days, and participating in the sacraments. Christian denominations also vary in their beliefs and practices, with some emphasizing certain aspects of the faith more than others.