The meaning of pyramids
A Square base represents the four corners of the World and the four directions.
Its peak rises to the sky, piercing the heavens, where it connects Heaven and Earth.
It is a path between the worldly and the heavenly.
It combines the triangular symbol and that of the square, the sacred numbers 3 and 4.
Also the word "pyramid" is composed of the Greek words "pyra" meaning fire, light, or visible, and the word "midos" meaning measures.
The pyramids of Giza are among the oldest man-made structures in existence and were used, among other things to indicate solstices and equinoxes.
The ancient Pythagorean relationship represented by a 3-4-5 right triangle is displayed in the dimensions of the King's Chamber, however the Pythagorean relation was not identified until 497 B.C.
Interestingly, the length of the diagonals of the antechamber within the very heart of the Great Pyramid is exactly 666 pyramid inches with the outer mantle composed of exactly 144,000 casing stones.