Roman Catholics are members of the largest Christian denomination, which follows the teachings of Jesus Christ and the authority of the Pope in Vatican City. They believe in the sacraments, including Baptism, Eucharist, and Confirmation, as essential means of grace. The Catholic Church emphasizes the importance of tradition, scripture, and the community of believers. Roman Catholics participate in regular worship services, known as Mass, and observe various religious holidays, such as Christmas and Easter, which celebrate key events in the life of Jesus.