Downing Street

Downing Street in London, England has for over two hundred years housed the official residences of two of the most senior British Cabinet ministers: the First Lord of the Treasury, an office now synonymous with that of Prime Minister of the United Kingdom, and the Second Lord of the Treasury, an office held by the Chancellor of the Exchequer. The Prime Minister's official residence is 10 Downing Street; the Chancellor's official residence is next door at Number 11. The Government's Chief Whip has an official residence at Number 12, though the current Chief Whip's residence is at Number 9.

Downing Street is located in Whitehall in central London, a few minutes' walk from the Houses of Parliament and a little farther from Buckingham Palace. The street was built in the 1680s by Sir George Downing (1632–1689) on the site of a mansion called Hampden House. The houses on the west side of the street were demolished in the nineteenth century to make way for government offices, now occupied by the Foreign and Commonwealth Office.