After the British burnt the original Capitol, it was rebuilt and finished in 1827; but the unexampled growth of the country and of Congress soon demanded an extension, which was begun in 1851. It is this extension which supplied the wings and dome, designed and constructed by the late Thomas U. Walter, that has made the building so attractive. This grand Republican palace of government, stretching over seven hundred and fifty feet along the top of the hill, has cost about $16,000,000. The old central building is constructed of Virginia freestone, painted white, the massive wings are of white marble from Massachusetts, and the lofty dome is of iron. The dazzling white marble gleams in the sunlight, and fitly closes the view along the great avenues radiating from it as a common centre. The architecture is classic, with Corinthian details, and, to add dignity to the western front, which overlooks the city, a magnificent marble terrace, eight hundred and eighty-four feet long, has been constructed at its base on the crest of the hill, which is approached by two broad flights of steps. The Capitol is surrounded by a park of about fifty acres, including the western declivity of the hill and part of the plateau on top. Upon this plateau, on the eastern front, the populace assemble every fourth year to witness the inauguration of the President when he is sworn into office by the Chief Justice, and delivers his inaugural address from a broad platform at the head of the elaborate staircase leading up to the entrance to the great central rotunda. In full view of the President, as he stands under the grand Corinthian portico, is a colossal statue of Washington, seated in his chair of state, and facing the new President, as if in solemn warning. The rotunda is the most striking feature of the Capitol interior; it is nearly one hundred feet in diameter, and rises one hundred and eighty feet to the ceiling of the dome, which is ornamented with fine frescoes by Brumidi. Large panelled paintings on the walls just above the floor, and _alti rilievi_ over them, represent events in the early history of the country, while at a height of one hundred feet a band nine feet wide runs around the interior of the dome, upon which a series of frescoes tell the story of American history from the landing of Columbus. But, most appropriately, the elaborate decorations, while reproducing so much in Indian legend and Revolutionary story, are not used in any way to recall the Civil War. Away up in the top of the dome there is a Whispering Gallery, to which a stairway laboriously leads.