This house was was home to Judge Duvall during the early part of the 19th century and stayed in his family until 1902. Justice Duvall's law office and root cellar still remain today. Marietta is situated on 25 acres of lawn and wooded areas and the grounds boast two County Champion trees and lovely old boxwood.
Marietta operates as an historic house museum and is furnished and interpreted to reflect the three generations of Duvall's that occupied the house. The Society of Mareen Duvall Descendants has relocated the family graveyard from its original location to the serene surroundings at Marietta. The site is also the headquarters of the Prince George's County Historical Society.