Possibly the most famous clock face and chimes in the world, Big Ben is actually the name of the biggest bell (13.5 tons) inside The Clock Tower (320 ft) which forms part of the Houses of Parliament. Built in 1858/9 the bell was named after one Sir Benjamin Hall and when it was cast it was Britain's heaviest bell. The clock's four dials each have a diameter of 23 ft, the minute hands are 14 ft long and the numerals on each face are nearly 2ft high.