The Smithsonian’s National Postal Museum is dedicated to the preservation, study and presentation of postal history and philately. The museum uses exhibitions, educational public programs and research to make this rich history available to scholars, philatelists, collectors and visitors from around the world.
The first pneumatic mail service begins in the US, carrying the mail in tubes below city streets. The service begins in Philadelphia, Pennsylvania, with a line between the central post office at 9th and Market Streets and the Chestnut Street Station.