In which year was the historic house and museum that the Maine Historical Society operates from designated as a National Historic Landmark?
Maine Historical Society The Maine Historical Society is the official state historical society of Maine. It is located at 489 Congress Street in downtown Portland. The Society currently operates the Wadsworth-Longfellow House, a National Historic Landmark, Longfellow Garden, the Maine Historical Society Museum and Store, the Brown Research Library, as well as the Maine Memory Network, an online database of documents and images that includes resources from many of state's local historical societies.
John Dunlap House The John Dunlap House, also known as Gilman Mansion, is an historic house located at 4 Oak Street in Brunswick, Maine, United States. Built in 1799, it was probably one of Brunswick's grandest houses of the time, built for John Dunlap, a prominent local businessman. It was listed on the National Register of Historic Places in 1979.