Architect of the Capitol | 30,660 followers on LinkedIn. Serve | Preserve | Inspire | Twenty-four hours a day – seven days a week – 365 days a year, the more than 2,000 people of the Architect of the Capitol (AOC) serve the nation as proud stewards of some of the most iconic buildings and grounds in the world. Across the U.S. Capitol campus, architects, engineers and technicians design, enhance, and maintain new and historic structures, spaces, and building systems.