**Jean-Pierre Houdin’s internal ramp theory** • The Pyramids of Giza were built 4,500 years ago. The construction of the first pyramid began in around 2,550 BC and stands at 147 metres tall. Mathematicians have estimated that it contains [2.3 million stone blocks](https://www.nationalgeographic.com/history/article/giza-pyramids), that weigh between approximately 2.5 and 15 tons each. Historians and architects continue to puzzle over how the Ancient Egyptians were able to carry such heavy blocks of stone. • The archaeologist [Jean-Pierre Houdin](https://matterundermind.com/the-secret-inner-workings-of-the-pyramids/) has theorised that the Ancient Egyptians used an internal ramp system to carry the stones and build the pyramids from the inside out. This system would spiral upwards throughout the pyramid, with turns at each corner and a pulley system in place to carry the stones. • In 1986, a French team of archaeologists used microgravimetry to take [thermal images of the pyramids](https://books.google.co.uk/books?id=tEM1Qz7nTLUC&pg=PA60&lpg=PA60&dq=french+team+internal+ramp&source=bl&ots=k35tRwZvYS&sig=ACfU3U0AzRiUkkvAXCDGR9XkiqdhEsYvpA&hl=en&sa=X&ved=2ahUKEwjnpZ7Z66TzAhXHs6QKHXjQDFkQ6AF6BAgzEAM#v=onepage&q=french%20team%20internal%20ramp&f=false). One later remarked to Houdin that one of their images resembled his computer models of an internal spiral ramp. • Archaeologists from the French Institute for Oriental Archaeology and the University of Liverpool have discovered the remains of [a ramp system](https://www.scientificamerican.com/article/a-ramp-contraption-may-have-been-used-to-build-egypts-great-pyramid/) in a quarry in the Eastern Desert of Egypt.

When Giza Pyramid builders laid the first layer of limestone blocks for the Great Pyramid, all that was required for the second layer was a method of leverage using the first layer, and so on for progressive layers. Just as human-beings walk upward on steps, step by step, Giza engineers raised Pyramid blocks step by step, thereby using all space available over the entire Pyramid’s four sides progressively until completion. Tomb models of “Petrie rockers” provide evidence of the “four-lobe pinion-pulley” which surround a Pyramid block and step walks its load when hoisted. The Giza Pyramid builders used the earliest known example of “Rack and Pinion” engineering technology, where the Pyramid consists of four sides of limestone Racks and the Four-Lobe pulleys are the Wooden pinions interacting the racks with positive displacement. The evidence and artifacts can be studied at haitheory.com Search “haitheory” for “The Documented Ancient Construction Method of The Great Pyramid” https://english.pravda.ru/science/142069-great_pyramid/ https://www.youtube.com/watch?v=KVG7mzJUZa4