Poor Ron Howard and the crew of The Da Vinci Code:

No equipment was allowed into the museum during open hours, which meant filming took place overnight, with external lights sending “moonlight” through the windows. More critically, no artwork could be touched or lighted directly, equipment had to be kept at a safe distance from paintings, no “blood” or mystical drawings could mark the wooden floors, even food and drink for the production crew were banned.

Oh, yes, and no filming of “Mona Lisa,” in the Salle des √Čtats, where Leonardo’s small oil looks out toward Veronese’s immense “Marriage at Cana.”

For Heaven’s Sake, Don’t Touch the Mona Lisa – New York Times