The Giza Necropolis, where the pyramids are located, is about 25km southwest of Cairo city centre, and 8km outside the old town of Giza. At Giza are three giant-size pyramids, and numerous smaller ones. The biggest as well as oldest of the three is the Pyramid of Khufu, also known as the Great Pyramid or the Pyramid of Cheops. The Pyramid of Khufu was built over a 20-year period, completed around 2560 BC. It entombs the Fourth dynasty pharoah Khufu