Sistine chapel
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As Sistine Chapel turns 500, Vatican may limit visitors

31 October 2012 Last updated at 10:58 GMT

As the Sistine Chapel prepares to celebrate its 500th birthday, the Vatican has admitted it may have to consider limiting visitor numbers.

Michelangelo's famous frescoes attract more than 20,000 tourists a day but critics argue the crowds make it impossible to truly appreciate the art.

Alan Johnston reports from the Vatican.