Christianity begins to flourish around the Roman Empire in Jewish communities. Initially the community doesn't really distinguish itself as a break or split from Judaism and the communities live in relative harmony.

This clip discusses the history of the Christmas holiday and some of the misconceptions surrounding it. It also explains how the modern form of the holiday came to fruition with its cards, gifts, trees, and icons such as Santa Claus.

John Green discusses how Jesus spread Christianity using his public image of being considered the Messiah. He also mentions a couple of historical reasons for Christianity becoming a world religion: The Jews opening up their religion to non-Jews, and Saul of Tarsus (Paul the Apostle) actively spreading Christianity throughout the Mediterranean.

Christianity, a religion based on the teachings of Jesus Christ, has about two billion followers. Learn about the story of Jesus Christ, where the Christian faith originated, and how it grew to become the largest religion on the planet.

Constantine, a Roman general competing for control of the empire, embraces Christianity. The faith flourishes as never before but as certain visions of Christianity become popular there are consequences for Judaism.