The Great Pyramid of Giza is the oldest and largest of the three pyramids in the Giza pyramid complex bordering present-day Giza in Greater Cairo, Egypt. It is the oldest of the Seven Wonders of the Ancient World, and the only one to remain largely intact.

Hemiunu is a man who lived in ancient Egypt, and who is believed to have been the architect of the Great Pyramid of Giza. Hemiunu's tomb lies close to Khufu's pyramid and contains reliefs of his image.

Khufu was an ancient Egyptian monarch who was the second pharaoh of the Fourth Dynasty, in the first half of the Old Kingdom period (26th century BC). Khufu succeeded his father Sneferu as king. He is generally accepted as having commissioned the Great Pyramid of Giza.

Egyptologists believe that the pyramid was built as a tomb for the Fourth Dynasty Egyptian pharaoh Khufu over a 20-year period concluding around 2560 BC. Initially standing at 146.5 meters (481 feet), the Great Pyramid was the tallest man-made structure in the world for more than 3,800 years.t is estimated to weigh approximately 6 million tonnes, and consists of 2.3 million blocks of limestone and granite, some weighing as much as 80 tonnes.

The Fourth Dynasty of ancient Egypt (notated Dynasty IV) is characterized as a "golden age" of the Old Kingdom of Egypt. Dynasty IV lasted from 2613 to 2494 BC. It was a time of peace and prosperity as well as one during which trade with other countries is documented.

The historian Herodotus claimed that it took 20 years for the great pyramid to be built. About 1,00000 slaves were involved in its construction.

Diodorus Siculus wrote in his book Bibliotheca Historica, "The stones used to build the great pyramid were brought from the Arabian peninsula." And the slopes were used in the process of building the great pyramid.

Napoleon Bonaparte's campaign discovered the corner of his base in the great pyramid. Napoleon's campaign consisted of 177 French civil scientists.

The first precise measurements of the pyramid were made by Egyptologist Sir Flinders Petrie in 1880–82 and published as The Pyramids and Temples of Gizeh. Many of the casing stones and inner chamber blocks of the Great Pyramid fit together with extremely high precision. Based on measurements taken on the north-eastern casing stones, the mean opening of the joints is only 0.5 millimeters (0.020 in) wide.

In 1974, a French scientist Joseph Davidovits gave a theory and stated that the pyramid blocks had been poured into the site using a type of concrete and the cover stones were also man-made. But the sample analysis of the stone does not support this theory.

The Great Pyramid of Giza, the largest and oldest of the three pyramids at the Giza Necropolis in Egypt and the only surviving of the original Seven Wonders of the Ancient World, was granted honorary status. The Great Pyramid of Giza was selected in New7Wonders of the World. New7Wonders of the World was a campaign started in 2000 to choose Wonders of the World from a selection of 200 existing monuments. The popularity poll via free Web-based voting and small amounts of telephone voting was led by Canadian-Swiss Bernard Weber and organized by the New7Wonders Foundation (N7W) based in Zurich, Switzerland, with winners announced on 7 July 2007 in Lisbon, at Estádio da Luz.

French engineer Jean-Pierre Houdin believes that the upper two-thirds of the pyramid was built around an inner spiral slope and an external slope to build the lower third, and he explains that cracks in two granite tablets in the king's room occurred during construction and pasted by Herman.

Ben Hendrix suggested that blocks were placed in polygons and rolled on zigzag slopes. And the slopes up and down once the pyramid reaches full height. This process needs heavy lifting equipment.