The Catholic Church is the largest Christian church, with over a billion members worldwide. It is led by the Pope, who is based in Vatican City. The church teaches that it is the one true church founded by Jesus Christ and emphasizes the importance of the sacraments, including Baptism and Eucharist. The Catholic Church has a rich history that dates back to the first century AD. It plays a significant role in global affairs, education, and charity. The church is known for its traditions, including the celebration of Mass and various religious holidays, such as Christmas and Easter.