The Saint Louis Exposition or St. Louis Expo was a series of annual agricultural and technical fairs held in St. Louis' Fairgrounds Park, from the 1850s to 1902. In 1904, the Louisiana Purchase Exposition, a major World's Fair, was held in St. Louis, Missouri. The annual agricultural/technical exposition was not held in 1903-4, and ceased after the World's Fair. Memorabilia from the annual St. Louis Expositions are sometimes confused with 1904 World's Fair memorabilia on auction websites.