"Big Ben Clocktower"

This design was created from a photograph. (See how)

Big Ben is one of London's best-known tourist landmarks, and looks truly spectacular at night when the clock faces are illuminated. You even know when parliament is in session, because a light shines above the clock face. The name Big Ben actually refers not to the clock-tower itself, but to the thirteen ton bell hung within. The bell was named after the first commissioner of works, Sir Benjamin Hall.

The clock in the tower was once the biggest in the world, able to strike the first blow for each hour with an accuracy of one second. The clock mechanism was completed by 1854, but the tower was not fully constructed until four years later.