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. The large pyramid serves as the main entrance to the Louvre Museum. Completed in 1989.
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 an 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. [wikipedia]