Tutankhamun's golden mask, his throne, and the 5,000 funerary objects that the young pharaoh took to his tomb 3,500 years ago are finally on display together in their new home. The Grand Egyptian Museum opens its doors this Saturday on the Giza plateau, 20 kilometers from Cairo, with the monumental pyramids of Khufu and Menkaure silhouetted 2 kilometers away on the horizon. It is a pharaonic project in every sense: it occupies 48 hectares (twice the size of the Louvre), cost one billion euros (mostly funded by Japan), and will exhibit between 50,000 and 100,000 archaeological pieces from Ancient Egypt. It is the largest museum in the world dedicated to a single civilization.