Pyramids radiocarbon dating project
It is surpassed in volume only by the Great Pyramid of Cholula in Puebla, Mexico, which, however, is much lower in height than Khufu's Pyramid.
At completion, the Great Pyramid was surfaced by white casing stones—slant-faced, but flat-topped, blocks of highly polished white limestone.
Many alternative, often contradictory, theories have been proposed regarding the pyramid's construction techniques.
There is disagreement on whether the blocks were dragged, lifted, or even rolled into place.
Many varied estimates have been made regarding the workforce needed to construct the Great Pyramid.These caused the monument to shine brightly in the sun, making it visible from a considerable distance.What can be seen today of the structure from afar is only the underlying step-pyramid core structure, but several of the casing stones can still be found around the base.Polish architect Wieslaw Kozinski estimated that it would have taken as many as 20 men to transport a 1.5-ton (1.36 metric tons) stone block.Based on this, he numbered the workforce at 300,000 men on the construction site, with an additional 60,000 off-site.