The Great Pyramid of Giza holds the most uniquely bizarre passageway ever constructed in an Egyptian pyramid. The ascending corridor, which famously leads to the magnificent Grand Gallery, is designed with masonry that cannot easily be explained.

Unlike every other pyramid corridor, the blocks of the ascending corridor are carved from enormous single stones called ‘girdlestones’. These blocks are also not aligned to the passage itself, but always oriented vertically with the pyramid.

Compounding this mystery is the fact that the limestone in the ascending corridor has deteriorated more than any other section of the Great Pyramid’s interior. Is it possible to reconcile all of these anomalies? What can the historical account of the Edgar Brothers documenting the ascending corridor teach us today?



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Special thanks to Anyextee and Jim Walker for their ascending corridor footage!

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0:00 Intro
0:51 Great Pyramid layout
1:34 Ascending Corridor damage
2:21 Ascending Corridor layout
3:39 Girdle Stones
5:08 Corridor stability
6:18 Lower Girdle Stones
6:53 Inferior limestone
8:12 Granite plugs
9:33 Overbuilding or improvising?
11:08 Lessons from the Edgar Brothers