The Pyramid of Cheops is one of the seven wonders of the world and there are lots of myths about how it was built and what is inside. At 140 meters high, it was the tallest building on earth for 4,500 years. Now the oldest papyrus in history has been found, which describes how parts of the work were done to build the Pyramids of Giza and what secrets may still be discovered. English documentary from 2018.