<Tr> <Th> Staff </Th> <Td> 3,224 </Td> </Tr> <Tr> <Th> Website </Th> <Td> Loc.gov </Td> </Tr> <P> The Library of Congress (LOC) is the research library that officially serves the United States Congress and is the de facto national library of the United States . It is the oldest federal cultural institution in the United States . The Library is housed in three buildings on Capitol Hill in Washington, D.C.; it also maintains the Packard Campus in Culpeper, Virginia, which houses the National Audio - Visual Conservation Center . </P> <P> The Library of Congress claims to be the largest library in the world . Its "collections are universal, not limited by subject, format, or national boundary, and include research materials from all parts of the world and in more than 450 languages . Two - thirds of the books it acquires each year are in languages other than English ." </P>

Where are the books in the library of congress
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