Diplomatic Reception Rooms, U.S. Department of State
The diplomatic reception rooms at the United States Department of State are forty-two principal rooms and offices where the United States secretary of state conducts the business of modern diplomacy. Located on the seventh and eighth floors of the Harry S Truman Building in Washington, D.C., the diplomatic reception rooms include one of the nation's foremost museum collections of American fine and decorative arts.
Source: Wikipedia — Diplomatic Reception Rooms, U.S. Department of State (CC BY-SA 4.0)