The National Archives holds the original documents of American democracy — the Declaration of Independence, the Constitution, and the Bill of Rights — displayed in a dim, cathedral-like rotunda in a sealed helium-filled case that protects them from further deterioration. The building on Constitution Avenue is John Russell Pope's neoclassical masterpiece, completed in 1935.
The document displays draw the largest crowds, but the Archives also holds research collections of extraordinary breadth: census records, immigration records, military service records, and diplomatic correspondence. For genealogical research, it is one of the most important repositories in the country. Free admission; advance timed entry recommended in peak season.