2580 BC,

The Egyptians start their massive 20-year project to construct what was at the time the tallest most advance structure in the world. Did these ancient people have the knowledge, the precision tools and the measurements to align this massive structure with true north and the exact northern coordinates equivalent to the speed of light? Were they helped by a more advance race? Were they actually more advance then we thought? Was this just a lie to hide something else. Join the investigators as they investigate, The Great Pyramid of Giza.

https://www.ancient-origins.net/ancient-places-africa-opinion-guest-authors/mathematical-encoding-great-pyramid-002323