The Chatillon-DeMenil House, located at 3325 DeMenil Place in Benton Park, St. Louis, Missouri, was begun in 1848 for the pioneer Henry Chatillon, then enlarged to its present form by prominent St. Louis businessman Nicolas DeMenil from 1855 to 1863. The house serves as a house museum, and according to its nomination to the National Register of Historic Places, described "as being the finest example of Greek Revival architecture in the Midwest."