How were the Egyptian pyramids at Giza built?

The broad outline is well supported. Egyptians cut stone in quarries with copper tools, floated it on boats along the Nile and a network of artificial waterways, and dragged it into place on sledges, probably up ramps, using ropes, rollers and levers. The exact methods of moving and placing the blocks remain the main point of disagreement, as noted by [wikipedia.org](https://en.wikipedia.org/wiki/Construction_of_the_Egyptian_pyramids) and [nationalgeographic.com](https://www.nationalgeographic.com/history/article/giza-pyramids). [1] [2]

According to [pbs.org](https://www.pbs.org/wgbh/nova/article/how-was-the-great-pyramid-built/), the Great Pyramid used three kinds of stone: fine limestone for the exterior, a more common limestone for the core, and granite for the king's chambers. The limestones were local, while the granite came from a quarry at Aswan, about 500 miles south. Copper for tools was mined in the Sinai. Papyri found at Wadi al-Jarf record dates and cargo deliveries, which the article compares to a spreadsheet of what the workers received. [3]

Boats carried the heavy materials on the Nile and on artificial waterways. [nationalgeographic.com](https://www.nationalgeographic.com/history/article/giza-pyramids) adds timber from Lebanon and cattle from the Nile Delta to feed the workers. Archaeologist Mark Lehner says the major influx of materials came in the flood season, when the Nile rose and filled the deep channel. [2] [3]

The tools used in quarrying are not fully clear. [bbc.com](https://www.bbc.com/history/ancient/egyptians/great_pyramid_01.shtml) reports that tool marks suggest pointed copper-alloy picks, axes or mauls in the Old and Middle Kingdoms, and that granite was probably prised out as loose boulders. No drills or saws survive. Experiments by Denys Stocks showed that copper tools fed with quartz sand could cut granite, an idea the BBC says is gaining acceptance. [4]

[stanfordmag.org](https://stanfordmag.org/contents/what-you-don-t-know-about-the-great-pyramid) describes wet clay called talfa used to grease the path for wooden sledges pulled by teams of up to 180 men, with about 2.3 million stones in total. Since the Egyptians used no block and tackle or cranes, levers are usually assumed to have positioned the blocks, per the BBC. [5] [4]

Most archaeologists agree that ramps were used, but no ramps survive at the Great Pyramid itself. [bbc.com](https://www.bbc.com/history/ancient/egyptians/great_pyramid_01.shtml) lists traces at other pyramids suggesting several systems: straight linear ramps, which would have needed to be very wide; steep staircase ramps; spiral ramps, which raise the question of what they rested on and how builders could check the corners; and zigzag ramps. Interior ramps have survived in some Abusir and Saqqara pyramids, though an exterior ramp would still have been needed. [4]

[nationalgeographic.com](https://www.nationalgeographic.com/history/article/giza-pyramids) says exterior ramps are generally believed, either zigzagging or spiralling, while a more controversial theory proposes internal ramps. It suggests future imaging of the pyramids' interiors might settle the question. The results do not say which view most specialists now favour beyond the general agreement on ramps. [2]

The BBC notes that in the 1980s Mark Lehner mapped the Giza plateau and argued the Egyptians had not levelled the whole area, but had made only the narrow perimeter strips around the pyramid's edges as horizontal as possible. [4]