The Great Pyramid of Giza was built as a tomb for the Egyptian Pharaoh Khufu around 2560 BC. It took approximately 20 years and a large workforce to construct the pyramid out of stone blocks that were transported from quarries. While some legends claimed it was built by slaves, it was more likely constructed by paid workers. The pyramid was precisely aligned and had internal chambers. It remains the only surviving structure of the ancient Seven Wonders of the World.