The Great Pyramids of Giza are world-renowned structures. The largest and oldest of the three pyramids is the Great Pyramid. It is the oldest of the Seven Wonders of the Ancient World. It is thought that it was built as a tomb for the Egyptian Pharaoh Khufu.
It was built over a period of 10-20 years. Upon completion, it stood at 480.6 feet tall. For 3,800 years, it was the tallest man made structure in the world. Each side of its square base is about 756 feet long. While the sheer size of the pyramid is impressive, the accuracy of the construction is just as astounding. On each of these four sides, the average error is just 58 millimeters.
The base is horizontal and flat and has an error of only 15 millimeters. Similarly, the base was squared to a mean corner error of only 12 seconds arc. The four sides of the base point to the four directions, north, south, east and west.
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