Andrew W. Mellon Auditorium
 The Andrew W. Mellon Auditorium (originally named the Departmental Auditorium) is a 750-seat historic Neoclassical auditorium located at 1301 Constitution Avenue NW in Washington D.C. The auditorium which connects the two wings of the United States Environmental Protection Agency building is owned by the U.S. government but available for use by the public.