Major Projects

A multi-phased project designed to address deferred maintenance, extend the life expectancy of the deteriorated stone and to replace missing elements of the U.S. Capitol Building.

Stone preservation is a top priority for the Architect of the Capitol (AOC) as nearly every building is enveloped in stone and all have problems.

The Architect of the Capitol's repair and renovation of the Summerhouse fountain and surrounding landscape is complete. Additional landscape improvements to the grotto and surrounding planting beds will continue into the spring of 2024.

When the Architect of the Capitol (AOC) does not receive enough funding to pay for all maintenance and repairs required across the U.S. Capitol campus, work gets deferred due to budget constraints.

The preservation of heritage assets on the U.S. Capitol campus is one of the Architect of the Capitol's (AOC) core functions.

Work to stabilize façade elements at the Thurgood Marshall Federal Judiciary Building has begun.

This two-phase project will replace the 85-year-old copper roof of the Library of Congress' John Adams Building.

A multi-year program ensuring hearing rooms on the Capitol campus have reliable features to support Congress' legislative duties.

The Architect of the Capitol (AOC) is has begun construction preparations related to the 2025 Inaugural Ceremonies.

The Cannon House Office Building's renewal is an example of the Architect of the Capitol's commitment to preserving our nation's history.

Restoring areas of the U.S. Capitol to represent an appropriate period as determined by the curatorial community.

To properly restore the Olmsted Terrace, a six-phased project is underway by the Architect of the Capitol (AOC) to repair the masonry at the terrace walls.

This restoration project entailed cleaning, repairing and restoring the Vermont marble of the cheek walls on either side of west steps, and the north, south and east façades of the Supreme Court Building.

The Russell Building is the oldest of the three Senate office buildings. In FY 2023, the AOC successfully completed the Russell Exterior Envelope Project, a multiyear restoration project to preserve and repair the exterior envelope of the century-old building.

The United States Botanic Garden (USBG) and Architect of the Capitol has updated the Children's Garden in the USBG Conservatory.