The second king (pharaoh) (reigned 2589-2566 BC) of the Egyptian 4th Dynasty (c 2575-2465 BC), during the Old Kingdom, and the successor of Snefru (2613-2589 BC). His name is an abbreviation of the phrase Khnum-kuefui ('Khnum protects me'). He was the builder/owner of the Great Pyramid at Giza, the largest of the ancient pyramids. The pyramid covers a ground area of 53,000 square meters and rises to a height of 148 meters, reflecting a complex and efficient organization of which the pharaoh was the head. Two of his sons, Djedefre (Redjedef) and Khafre, succeeded him.