where is the declaration of independence located in washington dc
National Archives Building 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.