But we do have some ideas. It seems that the Egyptians used pi in the construction of the Great Pyramid because when the perimeter is divided by its height, one gets a close approximation to 2π.

Here's perhaps one of the most interesting facts about the number pi : This French luxury perfume house has a men's fragrance ...

Map of the known corridors and rooms inside the Great Pyramid of Giza. Evidence of a secret corridor was detected in 2016 behind the famed chevron blocks on the north face (h). Another mysterious ...