Description: The National Museum of American History, known as the National Museum of History and Technology until 1980, was established in 1957 to house the growing US National Museum’s collections on the social, cultural, scientific, and technological history of the United States. The new museum opened in January of 1964.History of the National Museum of American HistoryAdditional
Description: The National Postal Museum was established in 1990 under an agreement between the Smithsonian and US Postal Service to preserve and display the National Philatelic Collection, formerly part of the National Museum of American History. The Postal Museum moved to the Washington City Post Office Building on Capitol Hill in 1993. History of the National Postal MuseumAdditional