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


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...


AOC Employee, MJ Pajak bikes to work on the Capitol campus.
This passionate group of AOC employees aims to improve biking conditions around...

U.S. Capitol Exterior Preservation Project Updates

Below is the latest information on current work underway to preserve the stone and metal of the U.S. Capitol.

Next Phase: South Extension (House Side)

Work will begin later this year on the South Extension, which includes the House Wing and Connecting Corridors.

Completed Phases


A deteriorated stone modillion from the U.S. Capitol and a newly carved one.

  • West Front
  • North Extension (Senate Wing)

These phases of the U.S. Capitol Stone and Metal Preservation are complete and scaffolding has been removed. More than 300 marble stone carvings replaced unsound and/or missing details on the cornice and column capitals. Light fixtures were refurbished and reinstalled.