The National Postal Museum, located in Washington, D.C., is the primary postal museum of the United States. It covers large portions of the postal history of the United States and other countries. It was established through joint agreement between the United States Postal Service and the Smithsonian Institution and opened in 1993.
Established: July 30, 1993
Location: Postal Square Building · Washington, D.C., U.S.
Director: Elliot Gruber
Public transit access: at Union Station · Amtrak/MARC/VRE at Washington Union Station
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The most venerable and polished of the tour-and-activity sites. – BBC