Christianity is the world's biggest religion, based on the life and teachings of Jesus Christ in the first century AD. The monotheistic religion has more than two billion followers all over the world.
The Roman Catholic Church, the Eastern Orthodox churches and the Protestant churches are Christianity's largest branches, and there are also numerous sects throughout the world. The Christian holy book is the Bible, and believers worship in churches. Practices include prayer, Bible study, baptism, the Eucharist (Communion), church on Sundays and several holidays. Symbols include the cross, the dove and the fish.
Earlier this month several hundred thousand Roman Catholics in Poland took part in a communal prayer for Christian values in Europe and the rest of the world. Though the event was billed as ‘a rosary for peace’, it stirred controversy because many of those who took part in it prayed for Poland to be spared the influx of Islamic immigrants. Julian Berner has this report from Warsaw.