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. Premises. The museum is located in the building that served as the main post office of Washington, D.C. for decades, from its construction in 1914 until 1986.
https://en.wikipedia.org/wiki/National_Postal_Museum
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. Premises. The museum is located in the building that served as the main post office of Washington, D.C. for decades, from its construction in 1914 until 1986.
