National Archives and Records Administration
The National Archives and Records Administration (NARA) is an independent agency of the United States government in charge of preserving and documenting government and historical records and with increasing public access to those documents, which comprise the National Archives. NARA is officially responsible for maintaining and publishing the legally authentic and authoritative copies of acts of Congress, presidential proclamations and executive orders, and federal regulations. The chief administrator of NARA, the Archivist of the United States, not only maintains the official documentation of the passage of amendments to the U.S. Constitution by state legislatures, but has the authority to declare when the constitutional threshold for passage has been reached, and therefore when an act has become an amendment. The National Archives Building, located in Washington, D.C., opened as its original headquarters in 1935. It holds the original copies of the three main formative documents of the United States and its government: the Declaration of Independence, the Constitution, and the Bill of Rights.
Visit their main Web site: www.archives.gov