[jpsb]

"Based on these estimates, building this in 20 years would involve installing approximately 800 tonnes of stone every day. Similarly, since it consists of an estimated 2.3 million blocks, completing the building in 20 years would involve moving an average of more than 12 of the blocks into place each hour, day and night"

And these stone age people were very well organized too!

[null and void]

People calculate stone placement rates for the Egyptian pyramids based on the “fact” that it must all have been done in 20 year, yet no one asserts that a medieval cathedral had to be built in 20 years.