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Christianity is a monotheistic religion centered on the life and teachings of Jesus of Nazareth as recounted in the New Testament.
Its followers, known as Christians, believe Jesus to be the Son of God and the Messiah (or Christ) prophesied in the Old Testament, the part of their scriptures they have in common with Judaism.To Christians, Jesus Christ is not merely a teacher and the model of a pious life but the revealer of God, the mediator of salvation and the saviour who suffered, died and was resurrected in order to bring about salvation from sin for all. Christians maintain that Jesus ascended into heaven and most denominations teach that Jesus will judge the living and the dead, granting everlasting life to his followers. The "good news" of Jesus' ministry is called the Gospel.
The Trinity is often regarded as an essential doctrine of mainstream Christianity. It is a complex topic and there are varying interpretations. The most common understanding of the Holy Trinity, as espoused in the Nicene Creed, is one God that exists as three Persons – Father, the Son, and the Holy Spirit. "Father, Son and Holy Spirit" represents both the immanence and transcendence of God. God is believed to be infinite and God's presence may be perceived through the actions of Jesus and the Holy Spirit.
The first time the disciples were called "Christians" (Greek Χριστιανός), meaning "followers of Christ", was in Antioch, as noted in Acts 11:26). Ignatius of Antioch was the first Christian to use the label in self-reference. The earliest recorded use of the term Christianity (Greek Χριστιανισμός) was also by Ignatius of Antioch, around 100 AD.
Like Judaism and Islam, Christianity is classified as an Abrahamic religion (see also, Judeo-Christian). Through missionary work and colonisation, Christianity spread firstly in the Middle East, North Africa, Europe and parts of India and subsequently throughout the entire world.
In spite of important differences of interpretation and opinion, Christians share a set of beliefs that they hold as essential to their faith.
Death and resurrection of Jesus
Main article: Death and resurrection of Jesus
The Crucifixion by Diego Velázquez (17th century)Christians consider the resurrection of Jesus to be the cornerstone of their faith and the most important event in human history. Within the body of Christian beliefs, the death and resurrection of Jesus are two core events on which much of Christian doctrine and theology depend. According to the New Testament, Jesus, the central figure of Christianity, was crucified, died, buried within a tomb, and resurrected three days later. The New Testament mentions several resurrection appearances of Jesus on different occasions to his twelve apostles and disciples, including "more than five hundred brethren at once",  before Jesus' Ascension. Jesus's death and resurrection are the essential doctrines of the Christian faith, and are commemorated by Christians during Good Friday and Easter, particularly during the liturgical time of Holy Week. Arguments over death and resurrection claims occur at many religious debates and interfaith dialogues.
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