The United States Capitol is the meeting place of the United States Congress.
The Thomas Jefferson Building is the oldest of the four United States Library of Congress buildings.
The District of Columbia City Hall houses essential government offices for the city's administration.
The National Building Museum is America's leading cultural institution devoted to the history and impact of the built environment.
The Old Patent Office Building, once home to the US Patent Office.
The Marine Barracks, Washington, D.C. is home to the Commandant of the Marine Corps.