The three largest pyramids in Egypt were built by Khufu, Khafre, and Menkaure. The oldest and largest, the Great Pyramid of Giza, was built around 2560 BC as a tomb for Pharaoh Khufu. Khafre, who built the second largest pyramid, may have also carved the Sphinx. It took around 100,000 people 20 years to build the Great Pyramid, which contains descending passageways, a grand gallery, and chambers for the king and queen.