Places in 1973 and was declared a National Historic Landmark in 1983. It is also designated as a historic public landmark by the Washington County History & Landmarks Foundation. See also List of National Historic Landmarks in Pennsylvania National Register of Historic Places listings in Washington County, Pennsylvania References External links Official site: The Bradford House Online Bradford House National Historic Landmarks in Pennsylvania Houses on the National Register of Historic Places in Pennsylvania Museums in Washington County, Pennsylvania Houses completed in 1788 Historic house museums in Pennsylvania Houses in Washington County, Pennsylvania Whiskey Rebellion Washington, Pennsylvania Pennsylvania state historical marker significations 1788 establishments in Pennsylvania National Register of Historic Places in Washington County, Pennsylvania