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+ The Great Pyramid of Giza[a] is the largest Egyptian pyramid and served as the tomb + of pharaoh Khufu, who ruled during the Fourth Dynasty of the Old Kingdom. + Built c. 2600 BC,[3] over a period of about 27 years,[4] the pyramid is the oldest + of the Seven Wonders of the Ancient World, and the only wonder that has remained + largely intact. It is the most famous monument of the Giza pyramid complex, which + is part of the UNESCO World Heritage Site "Memphis and its Necropolis".[5] It is + situated at the northeastern end of the line of the three main pyramids at Giza. +1. Tallest Man Made Structure for More Than 3800 years
+ Initially standing at 146.6 metres (481 feet), the Great Pyramid was the world's + tallest human-made structure for more than 3,800 years. Over time, most of the + smooth white limestone casing was removed, which lowered the pyramid's height to + the current 138.5 metres (454.4 ft); what is seen today is the underlying core + structure. The base was measured to be about 230.3 metres (755.6 ft) square, + giving a volume of roughly 2.6 million cubic metres (92 million cubic feet), + which includes an internal hillock.[6] The dimensions of the pyramid were 280 + royal cubits (146.7 m; 481.4 ft) high, a base length of 440 cubits (230.6 m; 756.4 ft), + with a seked of 5.5 palms (a slope of 51°50'40"). +