<Tr> <Th> Added to NRHP </Th> <Td> May 27, 1971 </Td> </Tr> <P> The National Archives Building, known informally as Archives I, is the original headquarters of the National Archives and Records Administration . It is located north of the National Mall at 700 Pennsylvania Avenue, Northwest, Washington, D.C. . The Rotunda entrance is on Constitution Avenue, while the research entrance is on Pennsylvania Avenue . A second larger facility, known as "Archives II" (or simply as "A2"), is located in College Park, Maryland . </P> <P> 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 . It also hosts an original version of the 1297 Magna Carta confirmed by Edward I. These are displayed to the public in the main chamber of the National Archives, which is called the Rotunda for the Charters of Freedom . The National Archives Building also exhibits other important American historical documents such as the Articles of Confederation, the Louisiana Purchase Treaty, the Emancipation Proclamation, and collections of photography and other historically and culturally significant American artifacts . </P> <P> Once inside the Rotunda for the Charters of Freedom, there are no lines to see the individual documents and visitors are allowed to walk from document to document as they wish . Photography is not permitted in the National Archives Museum . Photography with natural light is permitted in research rooms . </P>

What are the national archives in washington dc
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