Open daily 10 a.m. to 5:30 p.m.
Admission is always free!
2 Massachusetts Ave., N.E.
Washington, DC 20002
The museum's main entrance is located on the corner of First Street and Massachusetts Avenue NE. Other entrances have variable hours.
Issued on the centenary of Mexico’s first postage stamps.
Censored mail flown via Lisbon to the Red Cross in Geneva, Switzerland, for a World War II internee.