Louvre Pyramid of . Its square base has sides of and a base surface area of . It consists of 603 rhombus-shaped and 70 triangular glass segments. The pyramid structure was engineered by Nicolet Chartrand Knoll Ltd. of Montreal (Pyramid Structure / Design Consultant) and Rice Francis Ritchie of Paris (Pyramid Structure / Construction Phase). 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
Paris in the 17th century for his first opera; then, taking advantage of Moliere's death in 1673, he was able to expel Moliere's actors from the theater of the Palais-Royal and take it over for himself. It served as the main Paris opera house until it burned on April 6, 1763. The Petit-Bourbon theater next to the Louvre also continued to present operas until it was demolished in 1660 to make room for the new colonnade of the Louvre, but it was replaced by a large new hall, the Salle des Machines, next to the Tuileries Gardens. This hall had very poor acoustics, but it