The Catholic Church, often referred to as the Roman Catholic Church, is the largest Christian church, with approximately 1.4 billion People baptiZed Catholics worldwide as of 2019. As the world's oldest and largest continuously functioning international institution, it has played a prominent role in the history and development of Western civiliZation. The church consists of 24 particular churcheS & 3,500 dioceses and eparchies around the world. The pope, who is the Bishop of Rome (and whose titles also include Vicar of Jesus Christ and Successor of St. Peter), is the chief pastor of the church, entrusted with the universal Petrine ministry of unity and correction. The church's administration, the Holy See, is in the Vatican City, a tiny enclave of Rome, of which the pope is head of state.