Few people have impacted the history of the United States as significantly as Thomas Jefferson. As this Library of Congress exhibition notes, the third president was a "founding father, farmer, architect, inventor, slaveholder, book collector, scholar, [and] diplomat." Explore Jefferson through his papers, letters, and book collections on this well-executed web site. After perusing the home page, read the Overview, which explicates the exhibition. Then have a look at the list of Exhibition Items before exploring the sections on Monticello, Virginia Republic, Declaration of Independence, Federal Republic, The West, Revolutionary World, Legacy, and Jefferson's Library. Each section is replete with broad explanations and original documents for the viewer to enjoy.