The 1939-40 World's Fair in New York City was the second largest World's Fair in U.S. history, second only to the 1904 World's Fair in Saint Louis, Missouri. The fair's theme was "Building the World of Tomorrow," and exhibitions featuring modern appliances marked major changes in U.S. culture. The fair, which originally featured pavilions from sixty foreign countries (including Poland and Czechoslovakia), was also profoundly impacted by the start of World War II. This online exhibit from the New York Public Library allows visitors to explore this historic event through essays (authored by a range of scholars), archival materials, and online galleries. Topics addressed in this exhibit include the role of women in the 1939-40 World's Fair, dance performances, and a sculpture entitled The Harp by Augusta Savage. The sculpture was strongly influenced by James Weldon Johnson's 1900 song Lift Every Voice and Sing.