 The authors go on to suggest, using computer simulations of the sky, that the pyramids, representing the three stars of Orion's Belt, along with associated causeways and alignments, constitute a record in stone of the celestial array at the vernal equinox in 10,500 BC.This moment, they contend, represents Zep Tepi, the "First Time," often referred to in the hieroglyphic record.They state that the initiation rituals of the Egyptian pharaohs replicate on Earth the sun's journey through the stars in this remote era, and they suggest that the "Hall of Records" of a lost civilisation may be located by treating the Giza Plateau as a template of these same ancient skies.