The Great Pyramid of Giza, built around 2560 BC for the Pharaoh Khufu, stands 138 metres tall (originally 146m — the casing stones are gone), contains an estimated 2.3 million blocks of stone averaging 2.5 tonnes each, and was the tallest man-made structure on Earth for nearly 4,000 years. It was built by ancient Egyptians, and we know quite a lot about how.
Not slaves — workers
The popular image of pyramid-building involves tens of thousands of enslaved people being whipped into labour. Archaeological evidence tells a very different story. In 1990, a complex of workers' tombs was discovered near Giza. The workers were buried with respect — not in mass graves but in individual tombs with offerings, which was a sign of honour in ancient Egypt. Their skeletons show signs of hard physical labour but also of medical care — evidence of healed bone breaks and surgical interventions. These were permanent, organised, fed, and respected workers.
Building the Great Pyramid required an extraordinary logistics operation. An estimated 20,000–30,000 workers needed to be housed, fed, equipped, managed, and coordinated. Archaeological evidence shows large bakeries capable of feeding thousands, breweries (workers were paid partly in beer — a nutritious, safe-to-drink liquid when the water supply was uncertain), and administrative records tracking work gangs. The pyramid is as much a triumph of organisation and supply chain management as it is of engineering.
How did they move the stones?
The limestone blocks came largely from quarries just south of Giza. Heavier granite blocks (used inside the pyramid) came from Aswan, 800km away, transported on the Nile. A 2014 discovery of a workers' diary confirms stone was transported on wooden sledges with water poured in front to reduce friction. Ramps — internal, external, or spiral — were used to raise blocks into position. The exact ramp system is still debated, but the principle is well understood.
Why build pyramids at all?
Egyptian religion held that the pharaoh was a divine being — a god-king whose successful afterlife was essential to the continued order of the universe. The pyramid was both a tomb and a machine for ensuring that afterlife: elaborate burial chambers, magical texts, and enormous resources were devoted to protecting the pharaoh's body and enabling his resurrection. The pyramid shape itself may symbolise the primordial mound of creation in Egyptian cosmology, or the rays of the sun descending to earth.
The Great Pyramid of Giza was built around 2560 BC. It was made for Pharaoh Khufu. The pyramid is 138 metres tall today. It used to be 146 metres tall but some stones fell off. The pyramid has about 2.3 million stone blocks. Each block weighs about 2.5 tonnes on average. For nearly 4,000 years, it was the tallest building in the world. Ancient Egyptians built it and we know quite a lot about how.
Not slaves — workers
Many people think slaves built the pyramids. They imagine thousands of slaves being whipped to work hard. But this is not true. In 1990, scientists found tombs of pyramid workers near Giza. The workers were buried properly in their own tombs. They had food and treasures buried with them. This showed they were respected and important. Their bones showed they did hard work. But their bones also showed doctors had helped them. Some broken bones had been fixed by doctors. These were proper workers who lived there all the time. They were fed well and treated with respect.
Building the Great Pyramid was like organising the biggest school project ever. About 20,000 to 30,000 workers needed homes, food, tools and instructions. It's like feeding everyone in a big town every day. Scientists found huge bakeries that could feed thousands of people. They also found places where beer was made. Workers got paid partly in beer because it was safe to drink. Beer had vitamins and the water wasn't always clean. There were also lists showing which teams did which jobs. Building the pyramid needed amazing planning, just like amazing building.
How did they move the stones?
Most limestone blocks came from quarries near Giza. The heavier granite blocks came from Aswan, 800km away. These travelled down the River Nile on boats. In 2014, scientists found an old diary from a worker. It explained how stones were moved on wooden sledges. Workers poured water in front of the sledges. This made them slide more easily, like a water slide. They used ramps to lift blocks up the pyramid. The ramps might have been straight, curved, or spiral. Scientists still argue about exactly how the ramps worked. But they understand the basic idea.
Why build pyramids at all?
Egyptians believed their pharaoh was like a god-king. They thought he needed to live forever after death. If the pharaoh didn't have a good afterlife, the whole world might fall apart. The pyramid was his tomb and his magic machine for living forever. Inside were special rooms, magic words, and everything he needed. Lots of money and work went into protecting his body. The pyramid shape might represent the first hill when the world was made. Or it might represent the sun's rays coming down to earth.