The ancient structure built as a tomb for Egyptian rulers is the Great Pyramid of Giza. Constructed during the Fourth Dynasty of the Old Kingdom around 2580–2560 BC, it is one of the most remarkable feats of engineering in history, originally standing at about 146 meters (481 feet) tall. Built for Pharaoh Khufu, the Great Pyramid was part of a larger complex that included temples and smaller pyramids for queens. It was designed to facilitate the pharaoh's journey to the afterlife, reflecting the ancient Egyptians' beliefs about death and the afterlife, as well as their impressive organizational abilities.