Centennial International Exhibition

The Centennial Exposition, held in Philadelphia from May 10 to November 10, 1876, was the first official World's Fair in the United States, celebrating the 100th anniversary of the Declaration of Independence. More than 10 million visitors and exhibitors from 37 countries attended the six-month event, which showcased America's rapid industrial growth, technological innovation, and artistic achievements.

The exposition introduced visitors to groundbreaking inventions and products that would shape modern life, including Alexander Graham Bell's first public telephone demonstration, the Sholes and Glidden typewriter, Heinz ketchup, and Hires Root Beer. Machinery Hall featured the enormous Corliss steam engine, while exhibits highlighted advances in manufacturing, transportation, and engineering, demonstrating the United States' emergence as a major industrial power.