Smithsonian National Postal Museum - housed in the Old Post Office building

The Smithsonian National Postal Museum is located in the historic Old Post Office Department Building at 2 Massachusetts Avenue NE and opened to the public in 1993. The museum’s permanent installations include the National Philatelic Collection and exhibitions on the history of postal services, mail transportation, and communication technologies. The museum also displays postal artifacts such as historic mail vehicles, uniforms, and rare stamps in climate-controlled exhibit spaces.