<P> The original building was completed in 1800 and was subsequently expanded , particularly with the addition of the massive dome , and expanded chambers for the bicameral legislature , the House of Representatives in the south wing and the Senate in the north wing . Like the principal buildings of the executive and judicial branches , the Capitol is built in a distinctive neoclassical style and has a white exterior . Both its east and west elevations are formally referred to as fronts , though only the east front was intended for the reception of visitors and dignitaries . </P>
when was the seat moved to the capitol
1800