Christianity
Christianity has had a large history from the time of Jesus and his apostles to the present time. Christianity began in the 1st century AD as a Jewish sect but quickly spread throughout the Greco-Roman world. Although it was originally persecuted under the Roman Empire, it later became the state religion. In the Middle Ages it spread into Northern Europe and Russia. During the Age of Exploration, Christianity expanded throughout the world, and is now the largest religion of the world.