There are about 110 pyramids currently known in Egypt, many in a state of great disrepair and almost unrecognisable. Some were built as burial places for kings and others for queens. A pyramid also may have represented a stairway for the king to ascend to the heavens.
How the Egyptians managed the complex organisation of labour and the physical movement of large stone blocks is still a matter for debate. Pyramid construction may have involved ramps being erected around the pyramid. Blocks of stone would have been pulled up on sledges and the ramps dismantled later. It is believed that most of the labour for the construction of the pyramids would have come from farmers who were available during the inundation season when the Nile River flooded and farmland was underwater. It would also have been an ideal time for the transportation by boat of large stone blocks from their quarries to the pyramid sites.
Ancient Egyptians believed that when the pharaoh died, he became Osiris, king of the dead. The new pharaoh became Horus, god of the heavens and protector of the sun god. This cycle was symbolized by the rising and setting of the sun.
Some part of a dead pharaoh's spirit, called his ka, was believed to remain with his body. And it was thought that if the corpse did not have proper care, the former pharaoh would not be able to carry out his new duties as king of the dead. If this happened, the cycle would be broken and disaster would befall Egypt. To prevent such a catastrophe, each dead pharaoh was mummified, which preserved his body. Everything the king would need in his afterlife was provided in his grave—vessels made of clay, stone, and gold, furniture, food, even doll-like representations of servants, known as ushabti. His body would continue to receive food offerings long after his death.
To shelter and safeguard the part of a pharaoh's soul that remained with his corpse, Egyptians built massive tombs—but not always pyramids. Before the pyramids, tombs were carved into bedrock and topped by flat-roofed structures called mastabas. Mounds of dirt, in turn, sometimes topped the structures.
The pyramid shape of later tombs could have come from these mounds. More likely, Egyptian pyramids were modeled on a sacred, pointed stone called the benben. The benben symbolized the rays of the sun; ancient texts claimed that pharaohs reached the heavens via sunbeams.
Contrary to some popular depictions, the pyramid builders were not slaves or foreigners. Excavated skeletons show that they were Egyptians who lived in villages developed and overseen by the pharaoh's supervisors.
The builders' villages boasted bakers, butchers, brewers, granaries, houses, cemeteries, and probably even some sorts of health-care facilities—there is evidence of laborers surviving crushed or amputated limbs. Bakeries excavated near the Great Pyramids could have produced thousands of loaves of bread every week.
Some of the builders were permanent employees of the pharaoh. Others were conscripted for a limited time from local villages. Some may have been women: Although no depictions of women builders have been found, some female skeletons show wear that suggests they labored with heavy stone for long periods of time.
Graffiti indicates that at least some of these workers took pride in their work, calling their teams "Friends of Khufu," "Drunkards of Menkaure," and so on—names indicating allegiances to pharaohs.
An estimated 20,000 to 30,000 workers built the Pyramids at Giza over 80 years. Much of the work probably happened while the River Nile was flooded.
Huge limestone blocks could be floated from quarries right to the base of the Pyramids. The stones would likely then be polished by hand and pushed up ramps to their intended positions.
It took more than manual labor, though. Architects achieved an accurate pyramid shape by running ropes from the outer corners up to the planned summit, to make sure the stones were positioned correctly. And priests-astronomers helped choose the pyramids' sites and orientations, so that they would be on the appropriate axis in relation to sacred constellations.
From stone pusher to priest, every worker would likely have recognized his or her role in continuing the life-and-death cycle of the pharaohs, and thereby in perpetuating the glory of Egypt.
The earliest pyramid was the Step Pyramid of king Djoser of the Old Kingdom's 3rd Dynasty over 4,600 years ago. The pyramid was the largest structure ever erected at Saqqara, the necropolis that overlooked the ancient capital of Memphis. Its construction was initially in the form of a low mastaba tomb upon which extra levels were gradually added to give it a step-like appearance.
Underneath Djoser's pyramid was a complex system of corridors with a burial chamber lined with Aswan pink granite about 28 metres underground. The entrance was sealed with a three-tonne granite plug. The pyramid's outside would have been cased with fine limestone, but this was removed long ago. Nearby were the Mortuary Temple, a Great Court and various other structures.