LONDON - It's one of the most famous names in the world, up there with the Eiffel Tower and Statue of Liberty - but now London's Big Ben clock tower is to be renamed Elizabeth Tower to mark the queen's 60th year on the British throne.

The announcement on Tuesday followed four days of celebrations earlier this month to mark 86-year-old Queen's Elizabeth's Diamond Jubilee.

The landmark, part of Britain's Houses of Parliament, is officially called the Clock Tower but is commonly known as Big Ben, the name of the giant bell in the tower that chimes the famous bongs in the capital.

Prime Minister David Cameron welcomed the name change. "The renaming of the Clock Tower to the Elizabeth Tower is a fitting recognition of the Queen's 60 years of service. This is an exceptional tribute to an exceptional monarch," he said.

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