The Olympic Bell was commissioned and cast for the 2012 London Olympic Games, and is the largest harmonically-tuned bell in the world. The bell is cast in bronze and is two metres high with a diameter of 3.34 metres, and weighs 22.91 tonnes.
In September 2011 the Whitechapel Bell Foundry, a few miles from the Olympic Stadium, was commissioned to make the bell. The Foundry completed its design, profile, lettering and tuning. However, it was no longer able to cast such a large bell (its furnace capacity is 8 tonnes, as the large Victorian era bells had gone out of fashion), and so subcontracted casting to Royal Eijsbouts of the Netherlands. There was some controversy over using a non-British firm, as Taylor’s Bell Foundry in Loughborough had also tendered to cast the bell. The hammer mechanism and hanging framework were made by other firms and twenty companies in three countries were eventually involved with its production. The bell was installed and tested in the stadium at midnight on 1 June 2012. It was designed to be as large as possible but needed to fit through the athletes’ tunnel; when it arrived there were only a few inches to spare.
The bell is the heaviest in Europe and the largest harmonically tuned bell in the world. Its main note (in campanology, its 'hum tone') is a B note, and so it has the lowest tone in the world. It is also 30 cm wider than the previously-largest bell in Britain, 'Great Paul' at St Paul’s Cathedral cast by Taylor’s in 1881.
The bell is inscribed with "London 2012" and a line from Caliban's speech in The Tempest: "Be not afeard, the isle is full of noises", which featured in the Olympics opening ceremony spoken by Kenneth Branagh. The other side bears the legend "Whitechapel" and the Foundry's coat of arms.
Bradley Wiggins, who had won the Tour de France five days earlier, opened the ceremony by 'ringing' the bell. This was symbolic as the hammer was actually moved mechanically: one journalist noted "He may be a superhuman athlete but even Bradley Wiggins isn’t capable of setting the Olympic Bell’s monumental half-ton clapper in motion by hand!" The bell was also rung later in the ceremony, including just before Paul McCartney's performance of "Hey Jude". McCartney blamed his faltering start on the unexpected loud sound of the bell, as he had forgotten it was going to be rung.
The bell also featured in music within the ceremony, such as in "And I Will Kiss". The bell was recorded at night, in the rain during rehearsals; sound engineers had to ask for work to stop for half an hour to successfully record it.
The bell hung in the Olympic Stadium for the opening ceremony. It was then moved to make way for the Olympic cauldron, and stored in the Olympic Park. The Olympic Park re-opened in July 2013, and it is planned that the bell's permanent home will be within the park. After 200 years it is due to return to the Whitechapel Bell Foundry for retuning.
- "The Olympic Bell". Whitechapel Bell Foundry. December 2012. Retrieved 30 July 2013.
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- Olympic opening ceremony programme, page 13.