It started by an emperor in Rome he believed in Christianity than once the people seen he was believed in Christianity, he people started to believed in it to.
One of the many factors that contributed to the fall of the Roman Empire was the rise of a new religion, Christianity. The Christian religion, which was monotheistic ran counter to the traditional Roman religion, which was polytheistic (many gods). Finally, by this time, Romans considered their emperor a god.
Christians believe in one God that created heaven, earth and the universe. The belief in one God originated with the Jewish religion. Christians believe Jesus is the “Messiah” or savior of the world. They also believe that he is the son of God.
