The main pieces of evidence supporting the hydraulic theory were the discovery of a "dry moat" surrounding the pyramid, as well as a massive stone structure known as the Gisr el-Mudir. These features ...

At Medum, a step pyramid was built, then filled in with stone, and covered with a limestone casing. Nearby at Bahshur, construction was begun on a pyramid apparently planned to have smooth sides.

King Djoser of Egypt ordered his chief architect, Imhotep, to design a tomb like no other - The Step Pyramid of Djoser.

Because thieves (who robbed the burial chambers) stripped the pyramids of their outer casings of polished white limestone, they no longer reach their original heights. Today the Great Pyramid ...

This unfinished subterranean chamber, an unfinished chamber within Khufu's Pyramid, lies 90 feet (30 ... Workers down here chipped away at the limestone bedrock to build what is thought to be ...

We crossed a jungle-covered limestone ridge about 600 feet high ... In fact, they were pyramids built more than two millennia ago, and what we were circling was the largest of them all, the ...

This unfinished subterranean chamber, an unfinished chamber within Khufu's Pyramid, lies 90 feet (30 ... Workers down here chipped away at the limestone bedrock to build what is thought to be ...

"The pyramids are there as mountains of stone proving the otherworldly nature of their god-kings. You stand in front of those ...