The Great Pyramid of Giza is the largest of the three pyramids on the Giza Plateau and the only largely intact survivor of the Seven Wonders of the Ancient World. Built c. 2600 BC as the tomb of Pharaoh Khufu, it originally stood 146.6 metres (481 feet) tall and was constructed from an estimated 2.3 million stone blocks weighing 6 million tonnes in total. Today, after the loss of its smooth limestone casing, it stands at 138.5 metres (454.4 feet), with each base side measuring approximately 230.3 metres (755.6 feet). Gates investigated the pyramid's construction mysteries and recent technological discoveries, including muon-scan imaging that revealed previously unknown voids within the structure. The pyramid anchors a funerary complex that includes mortuary temples, smaller queens' pyramids, and five buried solar barques.
Construction of the Great Pyramid begins for Pharaoh Khufu, completed over approximately 26 years
Great Pyramid completed, becoming the world's tallest human-made structure
Great Pyramid and Giza complex designated UNESCO World Heritage Site as part of Memphis and its Necropolis
Egyptologists Mark Lehner and Zahi Hawass extensively excavate workers' villages near the pyramids
Muon-scan imaging reveals previously unknown voids inside the Great Pyramid
Gates investigates construction theories and recent discoveries for Expedition Unknown
Mainstream Egyptology, supported by extensive archaeological work by scholars including Mark Lehner and Zahi Hawass, attributes the Great Pyramid's construction to organized labor forces who lived in purpose-built workers' villages near the Giza Plateau. These workers were likely skilled laborers and seasonal farmers who worked during the Nile's flood season, not slaves as popular culture often suggests. The pyramid was built using primarily local limestone from the Giza Plateau, with finer white limestone imported from Tura for the casing and granite blocks weighing up to 80 tonnes brought from Aswan for internal chambers. Khufu's vizier Hemiunu is believed by some scholars to have been the pyramid's architect, though definitive evidence remains elusive.
The exact construction techniques remain genuinely debated within mainstream archaeology, with no definite consensus on how ancient workers achieved such precision. The pyramid's base sides each measure approximately 230.3 metres with remarkable accuracy, and the structure originally rose at a slope of 51°50'40". Engineers and archaeologists have proposed various theories involving ramps, levers, and counterweights, but no single explanation has been conclusively proven. The discovery of workers' villages, bakeries, and medical facilities nearby demonstrates the scale of organization required, suggesting a state-sponsored project that mobilized Egypt's resources over the approximately 26 years of construction.
Recent technological advances have added new dimensions to Great Pyramid research. Muon-scan imaging, which uses cosmic ray particles to create three-dimensional maps of dense structures, revealed previously unknown voids within the pyramid in 2017. These discoveries demonstrate that even after more than four millennia of study, the Great Pyramid still holds secrets. Gates' investigation explored both the traditional archaeological evidence and these cutting-edge discoveries, consulting with experts who study the monument using modern technology.
The pyramid anchors a larger funerary complex that included two mortuary temples connected by a causeway, three smaller pyramids for Khufu's wives, a satellite pyramid, and five buried solar barques. This complex design reflects the elaborate religious and ceremonial importance of royal burials in Fourth Dynasty Egypt. The Great Pyramid's designation as part of the UNESCO World Heritage Site "Memphis and its Necropolis" recognizes its outstanding universal value as both an archaeological treasure and a testament to ancient Egyptian civilization's organizational and engineering capabilities.
The Great Pyramid was the world's tallest human-made structure for more than 3,800 years, from c. 2600 BC until medieval cathedrals surpassed it
The pyramid's total volume is roughly 2.6 million cubic metres (92 million cubic feet), including an internal hillock incorporated into the structure
Blocks of granite weighing up to 80 tonnes were transported by boat on the Nile from Aswan to build the King's Chamber structure
The original construction used 280 royal cubits (146.7 metres) in height and 440 cubits (230.6 metres) base length, with a seked of 5½ palms (slope angle of 51°50'40")
Five buried solar barques were interred as part of Khufu's funerary complex, vessels intended to transport the pharaoh in the afterlife
The Great Pyramid and Giza Plateau are open to visitors, with tickets available to enter the pyramid's interior chambers, though the number of daily visitors inside is often limited. The site sits on the western edge of modern Cairo, easily accessible from the city center, though visitors should verify current hours, ticket policies, and any conservation-related access restrictions before traveling. The pyramid complex can be explored on foot, though the desert heat and crowds require preparation.
Cairo, Egypt (approximately 13 kilometers from city center)
October through April offers the most comfortable weather for visiting, with cooler temperatures and less intense desert heat. Early morning visits help avoid both midday sun and peak tourist crowds, particularly during holiday seasons.
UNESCO World Heritage Site (Memphis and its Necropolis, 1979)
Kingdom of Kush Pyramid Tombs
Another African pyramid complex investigated by Gates, offering comparative insights into ancient Egyptian and Nubian pyramid-building traditions
Egypt
Gates has investigated multiple ancient Egyptian sites throughout the country, exploring the civilization that built the pyramids
Ancient Egyptian tomb (Moses investigation)
Part of Gates' broader investigations into ancient Egyptian archaeology and biblical history in the region
Alexandria
Another major ancient Egyptian site Gates has explored, representing the Hellenistic period that came millennia after the pyramid builders
Historical data sourced from Wikipedia