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Located at 3051 M Street, NW, the Old Stone House is the oldest building situated within in the District of Columbia still on its original foundation. Built in 1765 from locally quarried blue granite, it was initially preserved under the belief that George Washington once slept there. The building housed a car dealership when it was purchased by the federal government in 1953. A rare example of pre-Revolutionary War-era architecture, the National Park Service opened the home for public tours three years later. The furnishings on display include a clock manufactured by John Suter, Jr. who was one of the building’s early owners.