NARRATOR: To mark this moment of creation, Teotihuacanos conduct the New Fire Ceremony at the base of the Sun Pyramid. The Aztec describe their own version of this ceremony in one of their few surviving books. (fires crackling) (fires extinguishing) MAN (speaking native language): ♪ ♪ (flames bursting) (men talking softly) MAN (speaking native language): NARRATOR: All fires in all the land would be lit from the single fire from the Sun Pyramid. ♪ ♪ The Fire Ceremony resets the calendar cycle and renews the world.