The Leaning Tower of Pisa is not the only tilted world architectural monument.
The western side of the Cheops pyramid, one of the seven wonders of the ancient world, is 14.1 cm longer than the eastern side.
This means that the base of the pyramid is not a perfect square. However, it is fairly accurate for the era it was built, says Glen Dash, an engineer from the team of scientists who discovered the inaccuracy.
Due to a small defect, the pyramid is slightly tilted to one side.
According to Dasha's report published on June 21, it is likely that initially "the difference between the east and west sides was less than 14.1 cm."
He wrote on Facebook: “They probably did better, but given the current state of the pyramid, we don't know for sure. We believe that initially the east and west sides differed by 7.6 cm.”
The Pyramid of Cheops was built 4500 years ago, its height is 135 m. Earlier it was covered with a thick layer of sedimentary rocks. Currently, most of them have come down, leaving the structure in its original form. Dash and his team measured the pyramid to find out the initial parameters.
The difference between the east and west sides was not previously known.
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“We were trying to figure out how technically advanced the Egyptians were, because the ancient civilization left almost no records of technical achievements,” says Dash. “The findings indicate that the Egyptians had amazing skills for their time. We can only hypothesize how they achieved such precise lines with the tools they had at their disposal."
The Egyptians used wood, stone, rope and copper with "incredible ingenuity and skill," he notes.
“Today, when we are faced with technical difficulties, we are building a new machine. The Egyptians, as far as we know, used what was at hand,”added Dash.