Egypt. Mexico. Peru. Cambodia. China. Sudan. Indonesia. Greece. The pyramid form appears independently across the ancient world, in cultures separated by oceans and millennia, with no known contact. Some were tombs, some temples, some observatories, some all three. The convergence raises a question that archaeology answers one way and alternative history answers another: why this shape, why everywhere, why then?
The pyramid is the form that emerges when a society accumulates enough surplus, organisation, and sacred motivation to build at the largest scale it can manage. It is not a mystery that it appeared independently — it is almost inevitable.
— David Pringle, Pyramid: Beyond ImaginationThe Orion correlation revisited: Robert Bauval's proposal that the three Giza pyramids mirror the three stars of Orion's Belt has been extended by some researchers to Teotihuacán (which also has three major pyramids in a non-linear arrangement), to Angkor Wat's major temple trio, and to other sites. The Teotihuacán correlation in particular has been argued with some astronomical precision. Whether these reflect actual design intent or selection bias (three prominent objects can always be correlated to three stars somewhere) is unresolved.