The U.S. Custom House and Post Office is a court house at 815 Olive Street in downtown St. Louis, Missouri. It was designed by architects Alfred B. Mullett, William Appleton Potter, and James G. Hill, and was constructed between 1873 and 1884. Located at the intersection of Eighth and Olive Streets, it is one of four surviving Federal office buildings designed by Mullett. The others are the Eisenhower Executive Office Building in Washington, D.C., the Century Post Office in Raleigh, N.C. and the U.S. Custom House in Portland, Me. It is in the Second Empire architectural style popular in the post Civil-War era. Mullett's other Second Empire buildings in Boston, Cincinnati, New York City and Philadelphia have been demolished. Description The three-story monumental granite building is long and deep. It includes a basement, sub-basement and attic level, with ceilings at the basement levels and thick foundation walls, which are surrounded by a deep dry moat for light and ventilation. The basement connects to a tunnel under 8th Street that was used for the delivery of mail to the post office. The basement material is red Missouri granite, while the upper floors are gray granite from Hurricane Island, Maine, between and in thickness. The building surrounds a skylit inner courtyard, by . High ceilings predominate in the main structure, with first floor ceilings at and second and third floors at . Interior structure is a mixture of wrought and cast iron, supporting arched brick floors in a system that was referred to at the time of construction as "fireproof." The building's windows were provided with fireproof shutters. The principal facade is the southern, along Olive Street, which features an iron mansard dome. Each street elevation features a central pavilion which in turn bears a portico. The Olive Street elevation's pediment is ornamented by the 1877 sculpture "America at War and America at Peace" by Daniel Chester French, his first major commission. Double-hung windows are set in cast iron frames throughout the building. Cast iron trim and molding frames interior sides of windows and doors. Interior detailing was extensive, with art glass panels, mosaic tile floors and bronze door knobs imprinted with the Seal of the United States. Thirty offices on the second, third and fourth floors featured red Bologna marble fireplace mantels. History The Customhouse and Post Office was constructed under the supervision of architect James G, Hill and construction superintendent