Current consensus among Egyptologists is that the head of the Great Sphinx is that of Khafre.
Along with these major monuments are a number of smaller satellite edifices, known as "queens" pyramids, causeways and valley pyramids.
It is said that Manetho's main goal was to prove to the Greeks that the Egyptians were the world's oldest people, but that he faced competition; Berosus was trying to do the same thing with his homeland, Mesopotamia, while the chief librarian of the Alexandria library, Erastosthenes, also claimed great antiquity for the Greeks.
It was Manetho who compiled Egyptian history into the thirty dynasties we are familiar with today.
Excavated for the first time by Mexican archaeologist Manuel Gamio in 1917, the original height is estimated to have been 27 metres.
This complex of ancient monuments includes the three pyramid complexes known as the Great Pyramids, the massive sculpture known as the Great Sphinx, several cemeteries, a workers' village and an industrial complex.
Against this consensus are theories that may sound airy and vague, concerning some unknown builders using methods lost forever in the mists of prehistory.
I here argue for the latter view, and suggest that two publishing events of 2007 are relevant: documentary evidence for Howard Vyse’s forgeries in the Relieving Chambers above the King’s Chamber in the Great Pyramid, published, plus a history of ancient mathematics which endorses the integrated (mathematical) ground-plan for the three Giza pyramids, by John Legon.
The traditional sources for this study are: ancient records and inscriptions, radio-carbon dating and archaeo-astronomy.
Each of theses methods has its own inherent problems associated to it as an accurate means of determination.