The Great Pyramid of Khufu was built during the Fourth Dynasty of Egypt's Old Kingdom (c. 2580-2560 BCE) on the Giza plateau. The structure reached 481 feet (146 meters) in height with a base covering 13 acres, making it the world's tallest human-made structure for over 3,800 years. The pyramid contains approximately 2.3 million stone blocks weighing 2-3 tons each, with some reaching 80 tons. Archaeological evidence from papyri at Wadi el-Jarf indicates workers transported limestone blocks via waterways connected to the Nile. Hemiunu, Khufu's vizier, supervised construction.