Roman Catholicism is the largest branch of Christianity, with over a billion followers worldwide. It is characterized by its belief in the authority of the Pope, who is considered the spiritual leader and representative of Christ on Earth. The faith emphasizes the importance of the sacraments, such as Baptism and Eucharist, as means of receiving God's grace. The teachings of Roman Catholicism are based on the Bible and sacred traditions. Key beliefs include the concepts of original sin, salvation through faith and good works, and the importance of community worship, particularly through the celebration of the Mass.