 Built between 1794 and 1797, the large Federal-style manor house is a National Historic Landmark and was opened to the public by its owners, the National Trust for Historic Preservation (NTHP), as a historic house museum in 1967.In 2002, Belle Grove became part of the Cedar Creek and Belle Grove National Historical Park, a National Park Service unit, although it continues to be owned and operated by the NTHP.It is part of a U.S. National Historic Landmark, the Cedar Creek Battlefield and Belle Grove Plantation.