<P> The Declaration of Independence , the Constitution , and the Bill of Rights have been displayed to the public in the Rotunda of the National Archives Building since 1952 . That year National Bureau of Standards placed the documents into hermetically sealed encasements filled with inert helium gas , which the Bureau believed would preserve the Charters well into the next century . Since the 1952 installation , National Archives conservators have conducted regular visual inspections of the encased documents . Since 1987 , these inspections have been greatly enhanced through the use of an electronic imaging monitoring system developed for NARA by the Jet Propulsion Laboratory in California . </P>
where is the declaration of independence located in washington dc
in the Rotunda of the National Archives Building