The core was made mainly of rough blocks of low-quality limestone taken from a quarry at the south of Khufu’s Great Pyramid.
These blocks weighed from two to four tons on average, with the heaviest used at the base of the pyramid.
Nevertheless, many of the casing stones around the base of the Great Pyramid can be seen to this day in situ, displaying the same workmanship and precision as has been reported for centuries.
Many varied estimates have been made regarding the workforce needed to construct the Great Pyramid.
More buildings and complexes are being discovered by The Giza Mapping Project.