Mustard (condiment) mixed with horseradish and dried for storage, which were then exported to London and other parts of the country, and are even mentioned in William Shakespeare's play "King Henry the Fourth, Part II". The use of mustard as a hot dog condiment is said to have been first seen in the US at the 1904 St. Louis World's Fair, when the bright-yellow French's mustard was introduced by the R.T. French Company. Mustard is most often used at the table as a condiment on cold meats.It is also used as an ingredient in mayonnaise, vinaigrette, marinades, and barbecue sauce. It is
History of St. Louis (1866–1904) a wooden bridge at Kingshighway crossing the rail yards of Mill Creek Valley, and a street paving program that improved air quality by reducing airborne dust particulates. The fair itself consisted of an "Ivory City" of twelve temporary exhibition palaces, and one permanent exhibit palace which became the St. Louis Art Museum after the fair. While in operation, the fair celebrated American expansionism and world cultures with exhibits of historical French fur-trading, and Eskimo and Filipino villages. Concurrently, the 1904 Summer Olympics were held in St. Louis, at what would become the campus of Washington University in St. Louis. Historical