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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 tree has been dedicated on the U.S. Capitol Grounds in honor of the 70th...
  • Stone Preservation on Capitol Hill

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    Stone Preservation

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

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  • Stone Preservation on Capitol Hill

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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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  • Stone Preservation on Capitol Hill

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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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  • Stone Preservation on Capitol Hill

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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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