Stewards of the iconic buildings and grounds of Capitol Hill since 1793.

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A black and white photograph of the United States Capitol in 1846.
The history of the United States Capitol Building begins in 1793. Since then,...

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A virtual Map of Capitol Hill from above
View a map of the U.S. Capitol and other buildings and grounds cared for by the...

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Painted portrait of Dr. William Thornton
The Architect of the Capitol (AOC) is the builder and steward of America’s...

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Generator Progress May 2014
Work is underway at the northwest corner of the Library of Congress John Adams...

Library of Congress

The law creating the Library of Congress, approved on April 24, 1800, called for its books to be housed in "a suitable apartment" in the Capitol. The copyright law of 1870 brought two copies of all copyright items to the Library. It immediately became apparent that the Library would soon run out of space. The Library’s Thomas Jefferson Building opened in in 1897 after the decision to relocate the Library of Congress into a separate facility was reached after years of discussion.

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