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) of the purchase. By the end of 1900, St. Louisans had purchased more than $5 million in stock in the Louisiana Purchase Exposition Company, and the next year, the city of St. Louis issued a bond for another $5 million for the company while the U.S. Congress appropriated the same amount. Company directors selected the western half of Forest Park as the site of the fair, sparking a real estate boom in the area. To meet anticipated demand by visitors, several hotels were constructed in downtown and the Central West End, and temporary lodging was erected in the fairgrounds itself