Book excerpt: Held in Philadelphia from May 10 through October 10, the 1876 Centennial Exhibition celebrated the 100th anniversary of American independence. Philadelphia hosted 37 nations in five main buildings and 250 additional structures on 285 acres of land. The celebration looked backward to commemorate the progress made over the 100-year period, and it announced to the world that American invention and innovation was on a par with that of our foreign counterparts. Patriotism abounded, as did messages of industrial and commercial prowess that promised a brighter future for all. Over nine million people attended this awesome consumer spectacle, an event that set the tone for a long series of world's fairs yet to come.