Big Ben, the name given to the clock in the eastern tower of the Houses of Parliament, Westminster, was originally applied only to its 13-ton bell, supposedly named after Sir Benjamin Hall, commissioner of works (1859). Famous for its accuracy, its chimes have become familiar nation-wide through radio and television.

A. S. Hargreaves

Big Ben Bell in the clock tower forming part of the Houses of Parliament at Westminster, London. Its name comes from Sir Benjamin Hall, who was commissioner of works (1859) when the bell was installed. The name can refer to the whole tower.