Discover relics from the Civil War, extensive clothing collections, and so much more at the Marietta Museum of History. Located on the second floor of the Kennesaw House, the museum traces the history of the area and the nation with artifacts ranging from an original land grant signed by King George in 1767 to a piece of the Pentagon from Steptember 11, 2001. Don t miss this hidden treasure just steps west o f the Marietta Square.