United States Capitol

This article is about the building. For the group of buildings, see United States Capitol Complex. For the capital city, see Washington, D.C.

United States Capitol
The west front of the U.S. Capitol in 2007
Location within Central Washington, D.C. Location within the District of Columbia Location within the United States
General information
Architectural style	American neoclassic
Location	Capitol Hill, Washington, D.C., United States
Coordinates	38°53′23″N 77°00′32″W
Construction started	September 18, 1793 (September 18, 1793)
Completed	1800 (1800) (first occupation) 1962 (1962) (last extension)
Client	Washington administration
Height
Height	288 feet (88 m)
Technical details
Floor count	5
Floor area	16.5 acres (6.7 ha)
Design and construction
Architects	William Thornton Benjamin Henry Latrobe (see Architect of the Capitol)
Website
www.aoc.gov/us-capitol-building
U.S. National Historic Landmark
Designated	December 19, 1960
D.C. Inventory of Historic Sites
Designated	November 8, 1964
Reference no.	24

The United States Capitol, often called the Capitol or the Capitol Building, is the seat of the United States Congress, the legislative branch of the federal government. It is located on Capitol Hill at the eastern end of the National Mall in Washington, D.C. Although no longer at the geographic center of the national capital, the U.S. Capitol forms the origin point for the street-numbering system of the district as well as its four quadrants. Like the principal buildings of the executive and judicial branches, the Capitol is built in a neoclassical style and has a white exterior.

Central sections of the present building were completed in 1800, when the 6th U.S. Congress convened there on November 17, 1800, moving the national capital from Philadelphia to Washington, D.C.. The building was partly destroyed in the 1814 Burning of Washington by British forces, then was fully restored within five years. The building was enlarged during the 19th century, by extending the wings for the chambers for the bicameral legislature as more states were admitted to the union, with the House of Representatives housed in the south wing and the Senate housed in the north wing. The massive dome was completed around 1866 just after the American Civil War. The east front portico was extended in 1958. The building's Visitor Center was opened in the early 21st century.

Both its east and west elevations are formally referred to as fronts, although only the east front was intended for the reception of visitors and dignitaries, while the west front is now used for presidential inauguration ceremonies. The building and grounds are overseen by the architect of the Capitol, who also oversees the surrounding Capitol Complex.