>>6133739Christian theology is summarized in creeds such as the Nicene Creed, in addition to the Bible. These professions of faith state that Jesus suffered, died, was buried, descended into hell and rose from the dead in order to grant eternal life to those who believe in him and trust in him for the remission of their sins. The creeds further maintain that Jesus physically ascended into heaven, where he reigns with God the Father in the unity of the Holy Spirit and that he will return to judge the living and the dead and grant eternal life to his followers. His incarnation, earthly ministry, crucifixion and resurrection are often referred to as "the gospel", meaning "good news". The term gospel also refers to written accounts of Jesus' life and teaching, four of which—Matthew, Mark, Luke and John—are considered canonical and included in the Bible. The Nicene Creed (325) and the biblical canon (5th century) were established by the ancient undivided Catholic Church and Eastern Orthodox Church, a period sometimes referred to as the Great Church, a unity lasting until the East–West Schism in 1054.
Throughout the history of Christianity, theological and ecclesiological disputes have resulted in schisms, with many distinct denominations. Worldwide, the four largest branches of Christianity are the Catholic Church, Protestantism, the Eastern Orthodox Church and Oriental Orthodoxy. The Catholic, Eastern Orthodox and Oriental Orthodox churches broke communion with each other in the East–West Schism of 1054 and the Chalcedonian schism in 451. Protestantism, while not a single denomination but a collective term, emerged in the Protestant Reformation in the 16th century, splitting from the Catholic Church.