the emigration of Christians to non-Christian areas around the world
Christianity has long been geographically widespread.This is mostly due to missionaries who travel the world to spread the "Good News."
Roman Catholicism
The most widespread religion on earth is Christianity, followed closely by the Baha'i Faith.
The most widespread religion is Christianity.
who is the most inportant teacher of christianity
Jesus Christ is considered the most important prophet in Christianity.
A number of religions developed out of Christianity. The most important of these is Islam.
The mythology of Scandinavia, which was also widespread in Germany and Britain until the establishment there of Christianity. For the people and places most important in Norse mythology, see Odin, Thor, trolls, and Valhalla.
because of a historical reason
Catholicism is, & it also happens to be the oldest form too.
The two main ones were Mithraism and Christianity.
A poll stated that 'Africe' has the most Christians - approximately 340 million. See related link for countries with Christian population data: