The number of 20 years is often repeated for the great giza pyramid, however its constructed using 2.3 million stones (~2.5 ton each) meaning they would have to place a stone every 5 minutes, for 20 years to make any sense. Traditional theories of egyptology fiercely defended by argument of authority are utterly useless.
In reality nobody has any idea how, when or even by whom (I would despute the cartouche as solid evidence) the great pyramid was actually built and egyptology certainly won't figure it out (at least not with its current systemic issues).
In reality nobody has any idea how, when or even by whom (I would despute the cartouche as solid evidence) the great pyramid was actually built and egyptology certainly won't figure it out (at least not with its current systemic issues).