Civil War Unknowns Monument

The Civil War Unknowns Monument is a burial vault and memorial honoring unidentified dead from the American Civil War. It is located in the grounds of Arlington House, The Robert E. Lee Memorial, at Arlington National Cemetery in Arlington, Virginia, in the United States. It was designed by Quartermaster General Montgomery C. Meigs and constructed in 1865.

Many sources often incorrectly state that the monument was constructed in the middle of the Lee flower garden. However, the monument is just west of the flower garden, in what was once a grove of oak and elm trees.