Lafayette Square is a neighborhood in St. Louis, Missouri, which is bounded on the north by Chouteau Avenue, on the south by Interstate 44, on the east by Truman Parkway, and on the west by South Jefferson Avenue. It surrounds Lafayette Park, which is the city's oldest public park — created by local ordinance in 1836.

Thomas Hart Benton, nicknamed "Old Bullion", was an American politician, attorney, soldier, and longtime United States Senator from Missouri. A member of the Democratic Party, he was an architect and champion of westward expansion by the United States, a cause that became known as Manifest Destiny. Benton served in the Senate from 1821 to 1851, becoming the first member of that body to serve five terms.