Capital of the United States, in the district of Columbia, on the left bank of the Potomac, 35 in. SW. of Baltimore; was founded in 1791, and made the seat of the Government in 1800; it is regularly laid out, possesses a number of noble buildings, many of them of marble, the chief being the Capitol, an imposing structure, where the Senate and Congress sit; near it, 1½ m. distant, is the White House, the residence of the President, standing in grounds beautifully laid out and adorned with fountains and shrubbery.