Louvre Palace areas, and parking areas, as well as an auditorium, a tourist bus depot, and a cafeteria, was constructed underneath the Louvre's central courtyards of the Cour Napoléon and the Cour du Carrousel. The ground-level entrance to this complex was situated in the centre of the Cour Napoléon and is crowned by the prominent steel-and-glass pyramid (1989), the most famous element designed by Pei. In a proposal by Kenneth Carbone, the nomenclature of the wings of the Louvre was simplified in 1987 to reflect the Grand Louvre's organization. Corresponding to the three pavilions through which the public must pass to reach
Paris in the Belle Époque way across Paris from Boulogne to Vincennes in 1856. But then it was purchased by the CGO, the main omnibus line, and remained simply a curiosity. Only in 1873 did the tramway begin to gain importance, when the CGO lost its monopoly on city transport and two new companies, Tramways Nord and Tramways Sud, one financed by Belgian banks and the other by British banks, began operating from the center of Paris to the suburbs. The CGO responded by opening two new lines, one from the Louvre to Vincennes, the other following the line of fortifications around the city. By