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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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The deburring tool used to remove sharp edges from sheet metal.
This small and seemingly simple tool reduces injuries by saving hands, which is...

Projects

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    Stone Preservation

    Watch our video on why stone preservation across Capitol Hill is a top priority.

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    Crumbling Down and Building Up

    Addressing the stone pandemic takes a team of historic preservationists, structural engineers and stonemasons, among others.

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    Masonry at the AOC

    The hands-on work caring for the stone founds across Capitol Hill falls to AOC masons.

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    Sandstone on Capitol Hill

    During the early years of Washington, D.C., sandstone was commonly used because could be found locally and was easy to…

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Stone Preservation on Capitol Hill