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The National Postal Museum is divided into galleries that explore America's postal history from colonial times to the present. Visitors learn how mail has been transported and the wondrous diversity of postage stamps.

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Exhibit Highlights

Constitutional Convention postal card art showing five men talking next to a brick building

Alexander Hamilton: Soldier, Secretary, Icon

This exhibit explores the extraordinary life of Alexander Hamilton through mail, portraits, postage, and pistols.

the text William H. Gross Stamp Gallery in red next to several colorful stamps

The William H. Gross Stamp Gallery

Named after its primary benefactor, the William H. Gross Stamp Gallery is the world’s largest gallery dedicated to philately.

photo of postal sorting machinery

Systems at Work

You drop a letter in a mailbox and then what happens?

Postal Inspector looking through binoculars

Behind the Badge: The U.S. Postal Inspection Service

Postal inspectors work to keep the mail safe.

a large group of soldiers

Mail Call

Explore the history of the military postal system through Mail Call.

Postmen of the Skies

Celebrating the 100th anniversary of the world’s first regularly scheduled airmail service.

My Fellow Soldiers: Letters from World War I

This compelling selection of letters illuminates emotions and thoughts engendered by the war that ushered in the modern era.

British Guiana One-Cent Magenta

This exhibition of the world’s most famous stamp is the longest and most publicly accessible showing ever.

Pony Express: Romance vs. Reality

This exhibition examines fictional and actual stories from the history of the world's best known mail carriers.

Airmail in America

Learn about the role the postal system played in the creation of America's commercial aviation industry.