The cult of Mithras would become very widespread in the late Roman period and, for a while, would provide serious competition to early Christianity. The pagan Romans used to celebrate a big festival called Saturnalia that went on for a week from 17 December. At the end of the festival, on the 25 December, the Mithras cult would celebrate the feast of Sol Invictus or Unconquered Sun. Many scholars believe that when the Christians came to dominate the Roman empire, they simply took over the popular pagan festival (after all, the actual birth date of Jesus Christ is not known).29 Mind you, not
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