The Great Pyramid of Giza

The Great Pyramid of Giza is the most substantial ancient structure in the world - and the most mysterious. According to prevailing archaeological theory - and there is absolutely no evidence to confirm this idea - the three pyramids on the Giza plateau are funerary structures of three kings of the fourth dynasty (2575 to 2465 BC). The Great Pyramid, attributed to Khufu (Cheops) is on the right of the photograph, the pyramid attributed to Khafra (Chephren) next to it, and that of Menkaura (Mycerinus) the smallest of the three. The Great Pyramid was originally 481 feet, five inches tall (146.7 meters) and measured 755 feet (230 meters) along its sides. Covering an area of 13 acres, or 53,000 square meters, it is large enough to contain the European cathedrals of Florence, Milan, St. Peters, Westminster Abbey and St. Paul's. Constructed from approximately 2.5 million limestone blocks weighing on average 2.6 tons each, its total mass is more than 6.3 million tons (representing more building material than is to be found in all the churches and cathedrals built in England since the time of Christ). The Great Pyramid was originally encased in highly polished, smooth white limestone and capped, according to legend, by a perfect pyramid of black stone, probably onyx. Covering an area of 22 acres the white limestone casing was removed by an Arab sultan in AD 1356 in order to build mosques and fortresses in nearby Cairo. Herodotus, the great Greek geographer, visited in the fifth century BC. Strabo, a Greco / Roman historian, came in the first century AD. Abdullah Al Mamun, son of the Caliph of Baghdad, forced the first historically recorded entrance in AD 820, and Napoleon was spellbound when he beheld the fantastic structure in 1798.