Pyramids of Giza
The only surviving wonder of the ancient world, whose precision, scale, and astronomical alignments have generated 200 years of competing explanations.
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History & Lore
The Great Pyramid of Khufu (built c. 2560 BCE) originally stood 146.5 metres tall — the world's tallest structure for 3,800 years. It contains an estimated 2.3 million stone blocks averaging 2.5 tonnes each, with the heaviest exceeding 80 tonnes. The casing stones, originally polished white Tura limestone, were removed in the 14th century CE for building material. The pyramid's base is level to within 2.1 cm across its 230-metre sides — precision achievable today but requiring careful planning.
The Giza complex is oriented to the cardinal points with an accuracy of 0.05 degrees, and the three main pyramids are positioned to mirror the belt stars of the constellation Orion — a point made by researcher Robert Bauval in 1983. The internal chambers, including the unfinished subterranean chamber and the mysterious relieving chambers above the King's Chamber, have no confirmed purpose and contain no mummies. Muon tomography conducted between 2016 and 2023 identified at least two previously unknown internal structures in the Great Pyramid, one of them substantial.
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