Queen Elizabeth Visits the Smithsonian, by Unknown, 1976, Smithsonian Archives - History Div, During her visit to the United States to commemorate the Bicentennial of the American Revolution, Queen Elizabeth II is greeted by Smithsonian Secretary S. Dillon Ripley (1964-1984) and Mrs. Mary L. Ripley and Chief Justice and Mrs. Burger, 8 July 1976..