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Photograph of people walking outside on a Self-Guided Tour of Capitol Hill
Visitors can tour many highlights on Capitol Hill without registering.

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The Architect of the Capitol’s challenge is unique – maintaining aging, iconic buildings; adapting state-of-the-art technology; and increasing responsiveness to environmental, security and safety considerations in a rich historical setting.
The Architect of the Capitol's challenge is unique – maintaining aging, iconic...

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Tuning fork used by Meigs to ensure that iron placed in the Dome was sound, along with copies of Meigs' writing and pieces of cast iron recovered from the Dome during the restoration project.
Tuning forks are frequently used by musicians to adjust their instruments. So...