Many myths of how the Great Pyramid of Giza was built include help from extraterrestrial visitors, elaborate ramps and crane machines. Still is remains a mystery. French architect Jean-Pierre Houdin has used a 3D modeling software to explain his theory that suggests “that a ramp was indeed used to raise the blocks to the top, and that the ramp still exists—inside the pyramid!” Bob Brier writes in Archeology:
Of the seven wonders of the ancient world, only the Great Pyramid of Giza remains. An estimated 2 million stone blocks weighing an average of 2.5 tons went into its construction. When completed, the 481-foot-tall pyramid was the world’s tallest structure, a record it held for more than 3,800 years, when England’s Lincoln Cathedral surpassed it by a mere 44 feet.
We know who built the Great Pyramid: the pharaoh Khufu, who ruled Egypt about 2547-2524 B.C. And we know who supervised its construction: Khufu’s brother, Hemienu.