About 2,550 B.C. Pharaoh Khufu, son of Snefru, ordered the building of the pyramid on the plateau of Giza. Although the exact date when construction commenced is not known, it is thought to have been around 2580 B.C. The pyramid took under 30 years to build. See the details on www.personal.psu.edu/mkw5102/giza.html.