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Roman Catholicism is a major branch of Christianity, tracing its origins to Jesus Christ and his apostles in the 1st century CE. Tradition holds that Jesus appointed his apostle Peter as the first leader of the church, and Peter is considered the first pope, the bishop of Rome. The church developed a sophisticated theology and organizational structure, influenced by Greek philosophy and formalized through councils and papal documents.123

The Roman Catholic Church's core beliefs include the Holy Trinity, the Incarnation, Passion, and Resurrection of Christ, and the importance of sacraments for sustaining grace. The Council of Trent in the 16th century defined Catholic doctrine in response to the Protestant Reformation, emphasizing justification by both faith and works, and the authority of both Scripture and tradition. Today, it is a global religion with over a billion followers, led by the pope and the Holy See in Vatican City.452

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