Philadelphia hosted the 1876 Centennial Exposition, a major earlier U.S. anniversary showcase before America250. Officially called the Centennial International Exhibition, it marked the 100th anniversary of the United States’ Declaration of Independence.
The exposition opened on May 10, 1876, and ran through November 10 in Philadelphia’s Fairmount Park. It was the first official world’s fair held in the United States, bringing together displays of industrial products, inventions, art, agriculture, and cultural achievements.
Among its best-known structures were Memorial Hall and Machinery Hall. The event also helped establish Philadelphia as a central location for national anniversary observances, a role the city again held during planning for the 2026 semiquincentennial.
Philadelphia’s 1876 event can be confused with the 1926 Sesquicentennial Exposition, which also took place there. The earlier exposition celebrated 100 years; the 1926 event marked 150 years, while America250 marks 250 years in 2026.