The Dossier Project
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archaeologicalUNESCO World Heritage SiteEgypt· North Africa29.9742°, 31.1339°

Great Pyramids of Giza

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.

Timeline

c. 2600 BC

Construction of the Great Pyramid begins for Pharaoh Khufu, completed over approximately 26 years

c. 2560 BC

Great Pyramid completed, becoming the world's tallest human-made structure

1979

Great Pyramid and Giza complex designated UNESCO World Heritage Site as part of Memphis and its Necropolis

Late 20th century

Egyptologists Mark Lehner and Zahi Hawass extensively excavate workers' villages near the pyramids

2017

Muon-scan imaging reveals previously unknown voids inside the Great Pyramid

2023

Gates investigates construction theories and recent discoveries for Expedition Unknown

Gates’ Investigation

  • Gates explored the construction theories behind the Great Pyramid, examining how ancient workers transported and placed an estimated 2.3 million stone blocks
    S16E01S16E02
  • The episode featured recent muon-scan technology discoveries that revealed hidden voids within the pyramid's interior structure, adding new mysteries to the ancient monument
    S16E01S16E02
  • Gates examined the three known chambers inside the pyramid, including the King's Chamber with its granite sarcophagus and the unfinished chamber cut into the bedrock
    S16E01S16E02
  • The investigation explored evidence from workers' villages excavated near the pyramids, supporting mainstream theories about organized labor forces rather than slave labor
    S16E01S16E02

What Experts Say

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.

Fun Facts

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

Planning a Visit

Getting There

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.

Nearest City

Cairo, Egypt (approximately 13 kilometers from city center)

Best Time to Visit

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.

Official Status

UNESCO World Heritage Site (Memphis and its Necropolis, 1979)

Related Sites

Also Covered In

Featured In2 episodes

Historical data sourced from Wikipedia