Archive of Americana This link opens in a new windowThe digital Archive of Americana is a family of comprehensive historical collections that allows researchers to discover and explore the United States in unprecedented depth and detail. The unique primary source materials offer opportunities for students and scholars to make original discoveries and new findings on nearly every aspect of the United States over nearly three centuries. The Archive of Americana includes: American State Papers, 1789-1838; the U.S. Congressional Serial Set, 1817-1980; and the Serial Set Maps.