Stewards of the iconic buildings and grounds of Capitol Hill since 1793.

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The U.S. Capitol Rotunda is a large, domed, circular room located 96 feet in diameter and 180 feet in height located in the center of the United States Capitol on the second floor.
The U.S. Capitol Rotunda is a large, domed, circular room 96 feet in diameter...

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Snapshot of a crowd of people on a guided tour through the Rotunda of the U.S. Capitol
Official Tours of the U.S. Capitol Building are offered Monday through...

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Photo of the East Front of the U.S. Capitol Building looking North to South.
AOC's annual Performance and Accountability Report (PAR) provides the results...

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The East Front of the U.S. Capitol at Dusk
The AOC works to make the Capitol Dome, an enduring symbol of democracy...

Architecture

Architecture

AOC Architects holding a blueprint while working

The Architect of the Capitol (AOC) employs more than two dozen architects who work in different divisions across the agency with various roles and responsibilities.

Some architects have the position of project manager, but the act of managing a project is a distinct skill for which they are trained independently of their professional background.

Many architects work directly within their chosen profession and have three general duties: execution of studies and design for projects, professional advice and guidance to the jurisdictions, and technical support to projects through reviews of consultant designs as managed by project managers. AOC architects also usually have extensive experience in historic preservation, which is generally developed through on-the-job experience.  

“Each of the buildings on Capitol Hill was carefully designed and built, and we need to make sure we preserve and maintain what others created for future generations,” says Mary Oehrlein, AOC historic preservation officer. Oehrlein continually stresses the need for regular maintenance, a task she compares to preventive medicine. “Properly maintaining the buildings is the best preservation.”

AOC leads the charge in successfully reducing the energy used in the historic public buildings within its purview, arguably the most difficult set of buildings in which to attempt such reductions. In addition, the AOC is one of the few places where staff architects and engineers work directly with highly skilled, in-house preservation crafts persons on a day-to-day basis.  

AOC recognizes that the ultimate goal in sustainability is the preservation of historic structures into virtual perpetuity: the buildings have no projected end-of-life, but are renewed over and over again. AOC employees are entrusted to preserve Capitol Hill’s national treasures for Congress and the public to enjoy for years to come.