Description: The National Postal Museum was established by an agreement between the Smithsonian and the United States Postal Service in 1990. However, its extensive collections of stamps and other philatelic materials date back to 1886. The Postal Museum is housed in the lower level of the former Washington City Post Office Building, which was built in 1914. The postcards in this gallery
Description: The National Air Museum was created by a congressional act on August 12, 1946. Its name was changed to the National Air and Space Museum (NASM) in 1966 as part of a congressional act authorizing a separate building to house its collections. The museum opened to the public on July 1, 1976. The Steven F. Udvar-Hazy Center located in Chantilly, Virginia, opened to the public on