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

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This painting depicts the Pilgrims on the deck of the ship Speedwell on July 22, 1620, before they departed from Delfs Haven, Holland, for North America, where they sought religious freedom.
This painting depicts the Pilgrims on the deck of the ship Speedwell on July...

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A virtual Map of Capitol Hill from above
View a map of the U.S. Capitol and other buildings and grounds cared for by the...

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Painted portrait of Dr. William Thornton
 The Architect of the Capitol (AOC) is the builder and steward of America’s...

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Guided Talk
Short talks will be held weekdays 9/17-9/23 at 1 p.m. in the Capitol Visitor...

Michael G. Turnbull

Michael G. Turnbull
Assistant Architect of the Capitol

Mr. Turnbull received his Bachelor of Architecture, a five-year professional degree, at the University of Illinois in Chicago. 

After university, Mr. Turnbull worked for several Chicago architectural firms, including Skidmore, Owings and Merrill, and O’Donnell, Wicklund, Pigozzi, and Peterson on numerous institutional and commercial projects. In 1984, Mr. Turnbull was retained by the Art Institute of Chicago to provide oversight on the museum’s capital building campaign.

After managing several successful renovations, he was created Director of the newly formed Department of Design and Construction. During his tenure with the museum, Mr. Turnbull oversaw significant and award-winning projects including the Daniel F. and Ada L. Rice Building Addition, the Ryerson Library Renovation, the Allerton Building Renovation as well as several major monument restorations for the museum’s Ferguson Fund, including the Clarence F. Buckingham Memorial Fountain and Lorado Taft’s Fountain of Time.

In 1998, Mr. Turnbull was selected by the 10th Architect of the Capitol, Alan M. Hantman to be the Assistant Architect of the Capitol and instituted major reorganization initiatives to improve project delivery and programming. Mr. Turnbull established a new Project Management Division, a Design Services Department, a Facilities Planning and Programming Department and restructured the operations at the Power Plant into a cohesive Utilities and Infrastructure unit.  

In 2002, Mr. Turnbull took on the Architect of the Capitol’s statutory responsibilities on the District of Columbia’s Zoning Commission (including the Board of Zoning Adjustment) and the National Capital Memorial Commission. Mr. Turnbull also serves as the agency’s senior executive on the modernization of the Supreme Court of the United States.

Mr. Turnbull is a Fellow of the American Institute of Architects, certified with the National Council of Architectural Registration Boards and is a licensed architect in Virginia, Maryland, the District of Columbia and Illinois.