The Louvre Pyramid (Pyramide du Louvre) is a large glass and metal pyramid, surrounded by three smaller pyramids, in the main courtyard (Cour Napoleon) of the Louvre Palace (Palais du Louvre) in Paris. When Francois Mitterrand was elected President of France in 1981, he laid out an ambitious plan for a variety of construction projects. One of these was the renovation of the Louvre Museum. Mitterrand appointed a civil servant named Emile Biasini to oversee it. After visiting museums in Europe and the United States, including the US National Gallery, he asked Pei to join the team. The architect made three secretive trips to Paris, to determine the feasibility of the project; only one museum employee knew why he was there. Pei finally agreed that a reconstruction project was not only possible, but necessary for the future of the museum. He thus became the first foreign architect to work on the Louvre.
The large pyramid serves as the main entrance to the Louvre Museum. Completed in 1989, it has become a landmark of the city of Paris. The structure, which was constructed entirely with glass segments, reaches a height of 20.6 metres (about 70 feet); its square base has sides of 35 metres (115 ft). It consists of 603 rhombus-shaped and 70 triangular glass segments. The pyramid and the underground lobby beneath it were created because of a series of problems with the Louvre's original main entrance, which could no longer handle the enormous number of visitors on an everyday basis. Visitors entering through the pyramid descend into the spacious lobby then re-ascend into the main Louvre buildings.
To minimize the impact of the structure, Pei demanded a method of glass production that resulted in clear panes. The pyramid was constructed at the same time as the subterranean levels below, which caused difficulties during the building stages. As they worked, construction teams came upon an abandoned set of rooms containing 25,000 historical items; these were incorporated into the rest of the structure to add a new exhibition zone. The new Louvre courtyard was opened to the public on 14 October 1988, and the Pyramid entrance was opened the following March. By this time, public opinion had softened on the new installation; a poll found a fifty-six percent approval rating for the pyramid, with twenty-three percent still opposed.