United States Capitol

:For other uses of "Capitol Hill," see Capitol Hill (disambiguation).

The Capitol grounds

The Capitol Grounds cover approximately 274 acres (1.1 km²), with grounds proper consisting mostly of lawns, walkways, streets, drives, and planting areas. Today's grounds were designed by noted American landscape architect Frederick Law Olmsted, who planned the expansion and landscaping performed from 1874 to 1892. In 1875, as one of his first recommendations, Olmsted proposed the construction of the marble terraces on the north, west, and south sides of the building that we see today.

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Olmsted also designed the Summer House, the open-air brick building that sits just north of the Capitol. Three arches open into the hexagonal structure, which encloses a fountain and twenty-two brick chairs. A fourth wall holds a small window that looks onto an artificial grotto. Built between 1879 and 1881, the Summer House was intended to answer complaints that visitors to the Capitol had no place to sit or water their horses and themselves. Modern drinking fountains have since replaced Olmsted's fountain for the latter purpose, but the horses ridden by the Capitol's mounted police unit can still occasionally be seen dipping into the original stone basin. Olmsted intended to build a second, matching Summer House on the southern side of the Capitol, but Congressional objections led to the project's cancelation.

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