According to a story on the Times website,
Four years after it was last cleaned and repaired Michelangelo’s statue of David in Florence is “at risk of collapse”, according to a restoration expert.
Apparently, the problem is partly the result of vibrations from traffic, both car traffic outside the Galleria dell Accademia and foot traffic within, and partly the consequence of Michelangelo’s decision to make a really big statue out of really bad marble. Here’s hoping they can figure out some way to keep David intact.