Philadelphia hosted the 1876 Centennial Exposition, held 150 years before America250.
The exposition took place in Philadelphia’s Fairmount Park from May 10 to November 10, 1876. It celebrated the 100th anniversary of the Declaration of Independence and was the first official world’s fair held in the United States. Exhibitors displayed industrial machinery, agricultural products, scientific instruments, artworks, and manufactured goods.
Philadelphia was a fitting location because the city had been central to the American Revolution and the early national government. Independence Hall, where the Declaration was adopted, stood nearby, giving the centennial celebration a direct connection to the events of 1776.
The fair introduced many visitors to new technologies and products, including the telephone and advanced industrial equipment. Its grounds included major structures such as Memorial Hall and Machinery Hall. The exposition is an important predecessor to later national anniversaries, including the 1976 Bicentennial and the 2026 Semiquincentennial.