Built around 1800, Dumbarton House is a prime example of Federal Period architecture in the United States. This was the house of Joseph Nourse, who was the first register of the U.S. Treasury, and his wife Maria between 1804 and 1813. Charles Carroll was the next owner and a cousin of the signer of the Declaration of Independence. The property was purchased in 1928 by the National Society of The Colonial Dames of America. 

After undergoing a restoration, the house was made into a museum that is open to the public. Visitors can view the Federal Period architecture, decorative arts, furniture and a view of Georgetown during the nation's earliest days. The house is accredited by the American Association of Museums.