Nathan Corwith Wyeth (April 20, 1870 – August 30, 1963) was an American architect. He is best known for designing the West Wing of the White House, creating the first Oval Office. He designed a large number of structures in Washington, D.C., including the Francis Scott Key Bridge over the Potomac River, the USS Maine Mast Memorial, the D.C. Armory, the , many structures that comprise Judiciary Square, and numerous private homes—many of which now serve as embassies. He also co-designed the Cannon House Office Building, the Russell Senate Office Building, the Longworth House Office Building, and an addition to the Russell Senate Office Building.