Western ChristianityWestern Christianity is one of two subdivisions of Christianity (Eastern Christianity being the other). Western Christianity is composed of the Latin Church and Western Protestantism, together with their offshoots such as the Old Catholic Church, Independent Catholicism and Restorationism. The large majority of the world's 2.3 billion Christians are Western Christians (about 2 billion – 1.2 billion Latin Catholic and 800 million Protestant). The original and still major component, the Latin Church, developed under the bishop of Rome.