
Construction of the Thomas Jefferson Building, from July 8, 1888 to May 15, 1894.
The 'Library of Congress' is the ''
de facto''
national library of the
United States and the research arm of the
United States Congress. Located in
Washington, D.C., it is the largest by shelf space and one of the most important libraries in the world. Its collections include more than 30 million cataloged books and other print materials in 470 languages; more than 58 million manuscripts; the largest rare book collection in
North America, including a
Gutenberg Bible (one of only four perfect
vellum copies known to exist); over 1 million
US Government publications; 1 million issues of world
newspapers spanning the past three centuries; 33,000 bound newspaper volumes; 500,000
microfilm reels; over 6,000
comic book[3] titles; the world's largest collection of legal materials;
films; 4.8 million
maps;
sheet music; and 2.7 million
sound recordings. The head of the Library is the
Librarian of Congress.
History

Main Library of Congress Building at the start of the 20th century.
The Library of Congress was established on
April 24,
1800, when
President John Adams signed an
act of Congress providing for the transfer of the seat of government from
Philadelphia to the new capital city of Washington.
The legislation appropriated $5,000 "for the purchase of such books as may be necessary for the use of Congress ..., and for fitting up a suitable apartment for containing them...."
The original library was housed in the new
Capitol until August 1814, when invading
British troops
set fire to the Capitol building, destroying the contents of the small library (3,000 volumes).
Within a month, former President
Thomas Jefferson offered his personal library as a replacement. Jefferson had spent 50 years accumulating books, "putting by everything which related to America, and indeed whatever was rare and valuable in every science"; his library was considered to be one of the finest in the United States.
Jefferson, who was heavily indebted, sought to use the proceeds of the sale of his books to satisfy his creditors.
He anticipated controversy over the nature of his collection, which included books in foreign languages and volumes of
philosophy,
science,
literature, and other topics not normally viewed as part of a legislative library, such as cookbooks.
To satisfy any objections as to the suitability of his collection for Congress' use, he wrote, "I do not know that it contains any branch of science which Congress would wish to exclude from their collection; there is, in fact, no subject to which a Member of Congress may not have occasion to refer."
In January 1815, Congress accepted Jefferson's offer, appropriating $23,950 for his 6,487 books, and the foundation was laid for a great national library. The Jeffersonian concept of universality, the belief that all subjects are important to the library of the American legislature, is the philosophy and rationale behind the comprehensive collecting policies of today's Library of Congress.
On
December 24,
1851, a fire destroyed 35,000 books, an original portrait of
Christopher Columbus, portraits of the first five US Presidents by
Gilbert Stuart, and statues of
George Washington,
Thomas Jefferson and
Marquis de Lafayette.
Buildings of the library
The Library is now spread over three buildings in
Washington, D.C.:
★ The ''
Thomas Jefferson Building'' (between
Independence Avenue and East Capitol Street on First Street SE), opened in 1897, and long the main building of the Library;
★ The ''
John Adams Building'' (between Independence Avenue and East Capitol Street on 2nd Street SE), opened as an annex in 1938; and
★ The ''
James Madison Memorial Building'' (between First and Second Streets on Independence Avenue SE), opened in 1981 as the new headquarters of the Library.
(Note: Between
April 13,
1976 and
June 13,
1980, the John Adams Building was known as the Thomas Jefferson Building.)
In late-November 2005, the Library announced intentions to launch the
World Digital Library, digitally preserving books and other objects from all world cultures.
Holdings
The Library developed a system of book classification called
Library of Congress Classification (LC) which is used by most US research and
university libraries, although most
public libraries continue to use the
Dewey decimal system.
The Library serves as a legal repository for
copyright protection and
copyright registration, and as the base for the
United States Copyright Office. Regardless of whether they are seeking copyright, all publishers are required to submit two copies of their ''copyrightable'' works to the Library - this requirement is known as ''mandatory deposit''.
[4] Nearly 22,000 new items published in the U.S. arrive every business day at the Library. Contrary to popular belief, however, the Library does not retain all of these works in its permanent collection, although it does add an average of 10,000 items per day. Rejected items are used in trades with other libraries around the world, distributed to federal agencies, or donated to schools, communities, and other organizations within the United States.
[5] As is true of many
similar libraries, the Library of Congress retains copies of every publication in the English language which is deemed significant.
''
The Guinness Book of World Records'' currently lists the Library of Congress as the "World's Largest Library".
[6] This apparently is based on the shelf space the collection occupies; the Library of Congress states that its collection fills about 530 miles (850 km),
[7] while the
British Library, reports about 388 miles (625 km) of shelves.
[8] The Library of Congress holds about 130 million items with 29 million books against approximately 150 million items with 25 million books for the British Library.
It is estimated that the print holdings of the Library of Congress would, if digitized and stored as plain text, constitute 17 to 20
terabytes of information. This leads many people to conclude that 20 terabytes is equivalent to the entire holdings of the Library, but this is misleading because the Library contains many items in addition to books, such as photographs, maps, and sound recordings. (Occasionally, this figure has been referred to as a
data transfer rate, LoC/s — Libraries of Congress per second – defined as 20 terabytes of data transferred per second). The Library currently has no plans for systematic digitization of any significant portion of its books.
The Library makes millions of digital objects, comprising tens of terabytes, available at its
American Memory site. American Memory is a source for
public domain image resources, as well as audio, video, and archived Web content. Nearly all of the lists of holdings, the ''catalogs'' of the library, can be consulted directly on its web site. Librarians all over the world consult these catalogs, through the Web or through other media better suited to their needs, when they need to catalog for their collection a book published in the United States. They use the
Library of Congress Control Number to make sure of the exact identity of the book.
The Library of Congress also provides an on-line archive of the proceedings of the
U.S. Congress at
THOMAS, including bill text,
Congressional Record text, bill summary and status, the Congressional Record Index, and the
United States Constitution.
The Library also administers the National Library Service for the
Blind and Physically Handicapped, a talking and Braille library program provided to more than 766,000 Americans.
Using the Library

Library of Congress reading room
The library is open to the general public for academic research, and runs tours for visitors. Only those who are issued a "Reader Identification Card" may enter the reading rooms and access the collection. The Reader Identification Card is available in the Madison building to persons who are at least 18 years of age upon presentation of a government issued picture identification (''e.g.'', driver's license,
state ID card or passport). However, only members of Congress, Supreme Court Justices, their staff, Library of Congress staff and certain other government officials can actually check out books.
Libraries in the United States may request books and other items through
interlibrary loan from the Library of Congress if these items are not readily available elsewhere. Since 1902, the Library of Congress has served as a "library of last resort."
Annual events

The Great Hall interior
★ The
National Book Festival
★
Founder's Day Celebration
★
Gershwin Prize for Popular Song
★ Archives Fair
★ Judith P. Austin Memorial Lecture
★
Davidson Fellows Reception
See also
★
Congressional Research Service
★
★
Federal Research Division
★
Library of Congress Classification
★
Library of Congress Country Studies
★
Library of Congress Living Legend
★
Library of Congress Subject Headings
★
National Film Registry
★
National Recording Registry
★
Poet Laureate Consultant in Poetry to the Library of Congress
★
United States Copyright Office
★
United States Senate Library
★
Documents Expediting Project
★
The Feleky Collection
★
World Digital Library
References
1. Annual report 2006
2. Year 2006 at a glance
3. About the Serial and Government Publications Division
4. Mandatory Deposit
5. Fascinating Facts
6. Largest Library
7. About the Library
8. Did You Know?
External links
★
The Library of Congress website
★
★
History of the Library of Congress
★
★
American Memory
★
★ Search the
Library of Congress catalog
★
★ Search the [telnet://locis.loc.gov/ Library of Congress catalog (Telnet)]
★
★
thomas.loc.gov, legislative information
★
★
Standards, The Library of Congress
★
Library Of Congress Meeting Notices and Rule Changes from The Federal Register
RSS Feed
★
Outdoor sculpture at the Library of Congress