Museum of Science and Industry (Chicago) of Progress event. For years, visitors entered the museum through its original main entrance, but that entrance became no longer large enough to handle an increasing volume of visitors. The newer main entrance is a structure detached from the main museum building, through which visitors descend into an underground area and re-ascend into the main building, similar to the Louvre Pyramid. In 1983, due to increased attendance, the museum started construction of its underground parking lot, located in three underground levels below the front lawn. Construction of the underground parking lot was finished in the 1990s. For over 55 years,
Paris in the Belle Époque pioneer Alberto Santos-Dumont, who made the first aircraft flight in Paris in 1906. The "Santos watch" went on sale in 1911 and was a huge success for the company. The industry of mass tourism and large luxury hotels had arrived in Paris under Napoleon III, driven by new railroads and the huge crowds that had come for the first international expositions. The expositions and the crowds grew even larger during the "Belle Époque"; twenty-three million visitors came to Paris for the 1889 exposition, and the 1900 exposition welcomed forty-eight million visitors. The Grand Hôtel du Louvre, built for the universal