The recent robotic explorations of the 'air-shafts' in the Great Pyramid have demonstrated that there are still many mysteries surrounding the ancient monument. Ian Shaw discusses the debate around the building of the great structure and investigates the methods used in its construction.
Great debate:
Since at least the time of the ancient Greeks, there has been considerable debate about exactly how the Egyptians constructed King Khufu's Great Pyramid at Giza.
Few texts concerning Egyptian engineering methods have survived the centuries, and in recent years experimental archaeology has been the main means for discovering the methods used for building the structure. Despite this, there are still many questions concerning the quarrying, dressing and transportation of the stone building blocks, let alone the methods by which they were placed meticulously in position. And there are further questions still about how the gigantic edifice was erected on a totally horizontal base, and aligned precisely with the stars.
Levelling:
Between 1880 and 1882, Flinders Petrie, the first truly scientific archaeologist to work in Egypt, undertook some careful survey work on the Giza plateau. This was the site of the pyramid complexes of the rulers Khufu, Khafra and ë - all of whom lived in the Fourth Dynasty.
The results of Petrie's work suggested to him that the Egyptians had levelled the area intended for the Great Pyramid by cutting a grid of shallow trenches into the bedrock, flooding them with water, and reducing the intervening 'islands' of stone to the necessary height.
After this was suggested, for most of the next century, there was surprisingly little archaeological work on the pyramids at Giza, but in the 1980s the American Egyptologist Mark Lehner began to produce a meticulous new map of the plateau, incorporating the various holes and trenches cut into the rock around...
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building the great pyramid
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