First owned by Joseph Nourse, Register of the U.S. Treasury for the first six Presidents of the United States, Dumbarton House is a fine example of Federal period architecture. During the docent-led tours, which begin with a short video describing the history of the house and its varied owners, guests are able to view Federal period architecture, furniture, and decorative arts, as well as life in Georgetown during our nation’s earliest days. Dumbarton House is the National Society of The Colonial Dames of America's national museum and it also houses its national headquarters.