The ancient universe is different from ours today: the deities lived in every planet, as with in our world, and planets with deities were once very close to the Earth. Deity inhabits in all natural objects and phenomena!
"Pharaoh died, our Pharaoh died!" exclaimed Egyptians.
"He shall be buried with deities in the universe."
The Pyramid was built, beneath which lied dead Pharaohs. From certain angle and in certain time, the apex of the Pyramid could connect with the universe--- different apexes with different planets.
Dead Pharaohs are here, be with all deities! Thus the earliest monument of human was established, for commemorating "deity"!
It was also the largest tomb!
1989, Eastern Europe!
All communist monuments were transferred to a place in Eastern Europe, which is called monument park by someone, or monument tomb by others.