The Great Pyramids reliably keep the secret of ancient knowledge …
Let's step aside from exciting versions and trying to guess on the coffee grounds. Let's face the facts, obvious and already proven. What are the Great Pyramids of Egypt and what, based on this, can they be?..
We have the following indisputable features of the Pyramids:
1) Mathematical - the ratio of their geometric elements includes the "golden section" (the ratio between the apothem of the side face and half the length of the base of the Cheops pyramid), the number "pi" (the perimeter of the base is equal to the length of a circle whose radius is equal to the height of the Cheops pyramid) and trigonometric features, possibly following from the constructions used (the tangent of the angle of inclination of the lateral face of the Cheops pyramid is equal to the inverse sine of this angle (51 degrees 30 minutes)).
2) Astronomical - the orientation of the pyramids along the north-south line is performed with an accuracy of 3 minutes of arc; there are moves oriented towards some stars.
3) Geological - in addition to local material (limestone rocks located several hundred meters away), granite (presumably brought from Aswan, located 900 km upstream of the Nile) and basalt (origin unknown) were used.
4) Technological - during the construction, millions of limestone blocks with an average weight of 2.5 tons were used, slabs weighing more than 200 tons were used many times, careful finishing of not only limestone, but also granite and basalt slabs; there are conical holes drilled in granite and basalt and corresponding cores (discovered at the end of the 19th century) with a groove with a pitch of 2 mm; the passages laid in the thickness of the pyramids are made along lines deviating from the straight line by no more than 5 mm at a distance of about 80 m, the planes of the pyramid faces are made with great accuracy.
Thus, the Pyramids are clearly a technical device, even if it carries additional "cultural and educational" functions, they are just an addition, not a basis. What are the functions of the Pyramids?
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Taken separately, the Great Pyramids cannot be devices other than energy generators, since multiple duplication of any other device at such a small distance from each other, which requires such significant efforts during installation, does not seem rational (at the current level of knowledge and technology).
The dimensions of the pyramids indicate the possibility of using geophysical energy sources, possibly confined to faults or other features of the earth's crust associated with mechanical displacements.
If all or several pyramids are such generators, then it is natural to expect their identical internal structure, which is not observed.
Taken together, the Great Pyramids can be another device (for example, a communication device) that inevitably needs a source of energy, which can be one of them. Moreover, there must be a connection between the pyramids.
The key to understanding the functionality of the Great Pyramids should be a comprehensive study of objects from the standpoint of their technical properties and characteristics.
An interesting video on this topic, revealing many questions: