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
Louvre were remodelled under architects Louis Visconti and Hector Lefuel. The Louvre was damaged during the suppression of the Paris Commune. On 23 May 1871, as the French Army advanced into Paris, a force of Communards led by Jules Bergeret set fire to the adjoining Tuileries Palace. The fire burned for forty-eight hours, entirely destroying the interior of the palace and spreading to the museum next to it. The library of the museum and some of the adjoining halls were destroyed, but the museum was saved by the efforts of Paris firemen and museum employees. During the Third Republic (1870–1940) the