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Visitors can tour many highlights on Capitol Hill without registering.
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At the AOC we are leading the effort to conserve energy across Capitol Hill.
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A bowler hat discovered during the renewal of the Cannon House Office Building.
During the process of renewing the Cannon House Office Building, workers have...
July 1905 section drawing showing the general arrangement of the “timbrel arch” vault construction, which has been preserved in the AOC’s archival collection.
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