- Question
How were the Pyramids at Giza built?
The Pyramids at Giza are an engineering marvel from Egypt’s Old Kingdom period. The largest, the Great Pyramid, is 455 feet high and was constructed from approximately 2.3 million blocks weighing 2.5 tons each. There are many theories as to how the pyramids were built using primitive technology.
The External Ramp Theory
Evidence found at Giza supports the claim that at least some ramps were used. Ramps are commonly found in Egypt supporting other smaller pyramids and monumental structures. There are many variations on this theory. It is the most popular among archaeologists.
The Internal Spiral Ramp Theory
The Pyramids may have been built in a spiral from the inside-out. The structure of the pyramid itself was used as a ramp. This idea was invented by the Architect Jean-Pierre Houdin and based on the ideas of his engineer father. Recent surveys of the pyramids support this theory.
The Incline Theory
Builders may have used the steep gradient of the pyramid itself to haul blocks up the sides. In this model, the workers worked on the flat top of the pyramid and used a system of ropes to bring blocks to the top. This theory is popular with engineers.
The Ancient Aliens Theory
Extraterrestrials may have visited Earth in ancient times, imparting the knowledge needed to construct the pyramids. It is possible the ancient aliens left clues to their visit encoded in the pyramids' structure.