Four authors from Antiquity have had their detailed descriptions of the Great Pyramid survive to the present day. But Herodotus, Diodorus Siculus, Strabo, and Pliny the Elder all fail to record any mention of the Great Pyramid's upper chamber system.

This video examines why those four authors likely missed the upper chamber system based upon a pattern of deception that spans thousands of years.

We also examine how the Great Pyramid would be experienced by visitors through history, and why their graffiti is often lost to the ravages of time.

Thanks always to my fellow researchers whose efforts contributed to this video, particularly Stefan Bergdoll's writings, Valery Senmuth's photos, and my anonymous pal who has brought to light improved versions of the Edgar Brothers' photographic plates from 1910.

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0:00 Intro
1:01 Four ancient stories
2:07 Pyramid folklore
3:04 Upper chamber discovery
4:31 Testimony of Herodotus
5:28 Diodorus Siculus
5:51 Testimony of Strabo
6:10 Pliny the Elder
7:09 Caliph Al-Mamun
7:39 Descending corridor plugged
8:37 Unplugging by Caviglia
9:23 Testimony from Charles Piazzi Smyth
11:45 Misleading travelers
13:07 Motive for plugging passages
15:29 Plugging the well-shaft
16:23 Human patterns
17:34 Gates blocking access
19:04 Pyramid graffiti
20:23 Deterioration of evidence
20:57 Testimony of Belzoni
22:28 Khafre's pyramid access
23:29 History repeats