The Great Pyramid of Giza has stood tall for more than 4,600 years, surviving the rise and fall of empires, extreme weather and even powerful earthquakes — and scientists now believe they have uncovered the secret behind its incredible durability.
New research has revealed that the ancient wonder was built with structural features that naturally protect it against seismic activity, helping the massive monument withstand destructive earthquakes since the days of ancient Egypt.
Researchers used sensitive instruments known as seismometers to study subtle vibrations throughout the pyramid and surrounding areas. Measurements were taken at 37 different locations in and around the structure to analyse how the pyramid responds to constant background shaking caused by both natural forces and human activity.
The findings showed that the Great Pyramid of Giza maintains an exceptionally stable and balanced structural response despite its enormous size and complex internal design.
Located near Cairo, the pyramid was originally constructed as the tomb of Pharaoh Khufu during Egypt’s Old Kingdom era.
Each side of the pyramid measures around 230 metres at its base, covering roughly 13 acres of land. It once stood approximately 147 metres tall before erosion and the removal of outer casing stones reduced its height to about 138.5 metres today.
For nearly 3,800 years, it remained the tallest man-made structure on Earth.
Scientists identified several engineering features that contribute to its earthquake resistance, including its massive broad base, low centre of gravity, highly symmetrical shape and gradual reduction in mass towards the top.
The internal design also appears to play a major role in absorbing seismic energy. Researchers discovered that several hidden chambers above the King’s Chamber actually help reduce vibration levels, protecting one of the pyramid’s most important internal spaces from excessive shaking.
Lead researcher Mohamed ElGabry from Egypt’s National Research Institute of Astronomy and Geophysics said the pyramid’s design creates a remarkably balanced structure.
“These elements together create a well-balanced, coherent structure,” he explained.
Another researcher, Asem Salama, said the ancient Egyptians clearly possessed advanced practical knowledge involving stability, foundations and weight distribution, even if they may not have intentionally designed the pyramid specifically for earthquakes.
The study found that vibrations travelling through the pyramid are distributed evenly across the structure, helping prevent dangerous stress from concentrating in one area.
Interestingly, scientists noted that some earlier pyramids built before the Great Pyramid showed structural flaws, suggesting ancient Egyptian builders gradually perfected their engineering techniques through years of experimentation and experience.
Despite several major earthquakes striking the region throughout history — including devastating quakes in 1847 and 1992 that damaged thousands of buildings and killed hundreds of people — the Great Pyramid suffered only minimal damage.
Researchers said the monument remains one of humanity’s greatest achievements, not just because of its size and beauty, but also due to the extraordinary organisation and engineering required to complete it over approximately 20 years.
The project would have involved coordinating tens of thousands of workers, transporting massive limestone blocks, managing food supplies and maintaining a highly organised workforce on an unprecedented scale for its time.
“It reminds us what human civilisation is capable of when vision, science, organisation and determination come together,” ElGabry said.
Salama summed it up simply: “They really did build one for the ages.”
