London Big Ben

The Houses of Parliament and the clock tower are one of London's iconic landmarks.

The building is known as the Palace of Westminster and the clock tower is sometimes called St Stephen's Tower, although it is commonly referred to as Big Ben.

Big Ben is actually the massive bell inside the clock tower, which weighs more than 13 tons (13,760 kg).

Big Ben: London's Clock Tower

The clock tower looks spectacular at night when the four clock faces are illuminated.

• Each dial is 23 feet square (2.13 square metres)
• Big Ben's minute hands are 14 feet long (4.26 metres)
• The figures on the face of Big Ben are two feet high (0.6 metres)

A special light above the clock faces is also illuminated, letting the public know when parliament is in session.

Big Ben's timekeeping is strictly regulated by a stack of coins placed on the huge pendulum. Big Ben has rarely stopped. Even after a bomb destroyed the Commons chamber during the Second World War, the clock tower survived and Big Ben continued to strike the hours.

The chimes of Big Ben were first broadcast by the BBC on 31 December 1923, a tradition that continues to this day.

The History of Big Ban:

The Palace of Westminster was destroyed by fire in 1834. In 1844, it was decided the new buildings for the Houses of Parliament should include a tower and a clock. The bell was refashioned in Whitechapel in 1858 and the clock first rang across Westminster on 31 May 1859.

Just two months later, Big Ben cracked. A lighter hammer was fitted and the bell rotated to present an undamaged section to the hammer. This is the bell as we hear it today.