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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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Cooking Demo
Learn about quintessential fruits of fall in this cooking demonstration on...

Dome Restoration Project Overview

The United States Capitol Dome, symbol of American democracy and world-renowned architectural icon, was constructed of cast iron more than 150 years ago. The Architect of the Capitol recently completed a multi-year project to completely restore the Dome for the first time since 1959-1960.

The project consisted of repairing more than 1,000 cracks to make the Dome watertight and included the restoration and replacement of cast iron and ornamentation. The exterior paint was removed and new layers were applied to protect the dome from corrosion and effects from the elements. The project required scaffolding around the exterior of the Dome, as well as in the Rotunda.