Philadelphia hosted the 1876 Centennial Exposition referenced in United States Semiquincentennial history.
The exposition commemorated the 100th anniversary of the Declaration of Independence and was officially known as the International Exhibition of Arts, Manufactures and Products of the Soil and Mine. It was held in Philadelphia, the city where the Continental Congress met and where Independence Hall stands.
The fair became a major national celebration of American industrial and cultural development. Its grounds included exhibition buildings, machinery displays, agricultural exhibits, and international presentations. Memorial Hall, one of its best-known surviving structures, remains associated with the exposition.
Philadelphia also hosted the 1926 Sesquicentennial Exposition, marking 150 years, and served as a major historical focus for later anniversary planning. These earlier observances are separate from the 1976 Bicentennial and the 2026 America250 commemoration.