Christianity, major religion, stemming from the life, teachings, and death of Jesus of Nazareth (the Christ, or the Anointed One of God) in the 1st century ad. It has become the largest of the world’s religions. Geographically the most widely diffused of all faiths, it has a constituency of more than 2 billion believers. Its largest groups are the Roman Catholic Church, the Eastern Orthodox churches, and the Protestant churches; in addition to these churches there are several independent churches of Eastern Christianity as well as numerous sects throughout the world. See also Eastern Orthodoxy; Roman Catholicism; and Protestantism.
This article first considers the nature and development of the Christian religion, its ideas, and its institutions. This is followed by an examination of several intellectual manifestations of Christianity. Finally, the position of Christianity in the world, the relations among its divisions and denominations, its missionary outreach to other peoples, and its relations with other world religions are discussed. For supporting material on various topics, see biblical literature; doctrine and dogma; Jesus Christ; sacred; worship; prayer; creed; sacrament; religious dress; monasticism; and priesthood.