He estimated the number of workers necessary to erect the Great Pyramid at 360,000 and the construction time at 20 years.[55] Similar to Herodotus, Diodorus also claims that the side of the pyramid is inscribed with writing that "[set] forth [the price of] vegetables and purgatives for the workmen there were paid out over sixteen hundred talents."[56]

Strabo
The Greek geographer, philosopher, and historian Strabo visited Egypt around 25 BC, shortly after Egypt was annexed by the Romans. In his work Geographica, he argues that the pyramids were the burial place of kings, but he does not mention which king was buried in the structure. Strabo also mentions: "At a moderate height in one of the sides is a stone, which may be taken out; when that is removed, there is an oblique passage to the tomb."[58] This statement has generated much speculation, as it suggests that the pyramid could be entered at this time.[59]

Pliny the Elder
During the Roman Empire, Pliny the Elder argues that "bridges" were used to transport stones to the top of the Great Pyramid.
