The Louisiana Purchase Exposition, informally known as the St. Louis World's Fair, was an international exposition held in St. Louis, Missouri, United States, from April 30 to December 1, 1904. Local, state, and federal funds totaling $15 million were used to finance the event. More than 60 countries and 43 of the then-45 American states maintained exhibition spaces at the fair, which was attended by nearly 19.7 million people.

Thomas Rogers Kimball was an American architect in Omaha, Nebraska. An architect-in-chief of the Trans-Mississippi Exposition in Omaha in 1898, he served as national President of the American Institute of Architects from 1918 to 1920 and from 1919 to 1932 served on the Nebraska State Capitol Commission.