In 1955, Congress passed the Presidential Libraries Act of 1955, establishing a system of privately erected and federally maintained libraries. The Act encouraged other Presidents to donate their historical materials to the government and ensured the preservation of Presidential papers and their availability to the American people. Under this and subsequent acts, nine more libraries have been established. In each case, funds from private and non-federal public sources provided the funds to build the library. Once completed, the private organization turned over the libraries to the National Archives and Records Administration to operate and maintain.
who pays for the building of the presidential libraries
private and non-federal public sources