Historic Blenheim is a ca. 1859 brick farm house designed in the Greek Revival style and located in City of Fairfax, Virginia. During the American Civil War, Union soldiers were often encamped on the grounds surrounding the house and utilized it as part of a reserve hospital system. As a result, more than 115 of these soldiers inscribed words and pictures on the first and second floor walls, as well as the attic of the house.