Downing Street, Westminster, London, England. On the street are the British Foreign Office and, at No. 10, the residence of the first lord of the Treasury, who is usually (although not necessarily) the prime minister of Great Britain. Since nearly all prime ministers from the time of Robert Walpole (18th cent.) have lived at No. 10, it has come to designate the British government.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.