A dress from the exhibit "Jacqueline Kennedy: The White House Years".
One can see the First Lady wearing the same gown in the image on the wall behind.
Visit the Online Exhibit
The U.S. National Archives and Records Administration
8601 Adelphi Road, College Park, MD 20740-6001
Telephone: 1-86-NARA-NARA or 1-866-272-6272