I just heard a number I did not know, there are more than 2 million stone blocks on the Great Pyramid. Somehow they didn't mention this when I visited the place.
And it was built in 27 years.
This means almost 10 blocks per hour, and an average of 2500kg per block.
Mind boggling.
@Trinsec actually, I recently learned that that's a common misconception. Egyptologists seem to agree that the evidence is stronger for the pyramids being built by paid workers, such as farmers who'd work there during periods of flooding. (see, for example, https://www.usnews.com/science/articles/2010/01/12/egypt-new-find-shows-slaves-didnt-build-pyramids one of the sources for https://en.wikipedia.org/wiki/Slavery_in_ancient_Egypt)
@rodolpho They also had a shitton of slaves, and of those slaves probably the majority didn't survive the construction.