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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.
1856 British Guiana One-Cent Magenta. Loan from Stuart Weitzman. [Photo Credit: Smithsonian's National Postal Museum]