The cult of Mithras came from Persia and spread during the IIIrd and IVth centuries B.C. The cult has many similarities with Christian ceremonies and rites: baptism, communion wafer, and Sunday rest. On December 25, the sacrifice of a bull celebrated the Sol invictus (the invincible sun) and signalled the birth of a young sun god who sprang from a rock or a cave in the form of a newborn infant.
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