The Thomas Sappington House is one of the oldest brick structures in St. Louis County. Built in 1808 by slaves, it is named after its namesake, Thomas Sappington (1783-1843), whose family was one of the first to settle in the county. The house is a well-preserved and rare example of Federal-style architecture in the state. Given its association with Sappington and architecture, the house was added to the National Register of Historic Places in 1974. The house is part of a complex that features the research Library of Americana and Decorative Arts, and a restaurant. The site is owned and operated by the City of Crestwood.