The Pyramids ~ Shafts hundreds of meters deep drilled into limestone bedrock with almost perfect 90 degree angles. This kind of drilling technology has only existed for under a century, so how were the ancient Egyptians drilling, chiseling and lifting all these megalithic structures? The pyramids also encode high mathematics supposedly unknown to the simple ancient Egyptians, they are built precisely on the 30th degree latitude and aligned to within 3 arc minutes of true north.
Ancient Egypt Pyramids Floor Plan 1920s Historic by carambas~floor plan of the pyramids of Gizeh and the pyramids and necropolis of Sakkarah and Abusir. This plan of Ancient Egypt buildings was published in 1923 in Spain. Text in Spanish.