The Centennial Exposition was a world's fair held in Philadelphia from May 10 to November 10, 1876. It celebrated the 100th anniversary of the signing of the Declaration of Independence and showcased American achievements in industry, culture, and technology. The event attracted over 10 million visitors and featured more than 30 countries, highlighting innovations such as the telephone and the typewriter. The exposition took place in Fairmount Park and included numerous pavilions and exhibits. The centerpiece was the Memorial Hall, which housed art displays. The fair played a significant role in promoting American progress and fostering international relations during the post-Civil War era.