The unknowns of pyramid construction chiefly center on the question of how the blocks were moved up the superstructure. There is no known accurate historical or archaeological evidence that definitively resolves the question.
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Considering the pyramids were built more than four thousand years ago, the exact technique of construction remains a mystery and modern-day equipment was not available at the time.
It was the Egyptians who built the pyramids. The Great Pyramid is dated with all the evidence, I'm telling you now to 4,600 years, the reign of Khufu. The Great Pyramid of Khufu is one of 104 pyramids in Egypt with superstructure. And there are 54 pyramids with substructure.
Many people have said that the pyramids would last 1 million years or even until the world ended, but I'd say around 10,000 to 100,000 years based on current observations.
The square base of the Great Pyramid of Cheops, for instance, is just 3.4 arcminutes off of true north. That's a precision of about 1 millimeter per meter. Some of the later pyramids, however, deviate more, as if their architects' method for aligning them became less accurate over time.
The Giza Pyramids, built to endure an eternity, have done just that. The monumental tombs are relics of Egypt's Old Kingdom era and were constructed some 4,500 years ago.
The construction of the pyramids is not specifically mentioned in the Bible. What we believe about their purpose does not impinge on any biblical doctrine.
While the pyramid was originally built by 4,000 workers over the course of 20 years using strength, sleds and ropes, building the pyramid today using stone-carrying vehicles, cranes and helicopters would probably take 1,500 to 2,000 workers around five years, and it would cost on the order of $5 billion, Houdin said, ...
Attempted demolitionIn AD 1196, Al-Aziz Uthman, Saladin's son and the Sultan of Egypt, attempted to demolish the pyramids, starting with that of Menkaure. Workmen recruited to demolish the pyramid stayed at their job for eight months, but found it almost as expensive to destroy as to build.
Originally, the pyramids were covered in a layer of brilliant white limestone and topped by gold-plated capstones. In the desert sun, they would have glowed brilliantly for miles in every direction. The pyraminds were meant to be seen and marveled at.
Pyramids weren't constructed to contain mummies; tombs were. There were a variety of tombs: simple pit-graves, mastabas, burial chambers beneath pyramids, and rock-cut cliff tombs were the chief ones.