Director Ron Howard was thrilled when French President JACQUES CHIRAC allowed him to film The Da Vinci Code in Parisian gallery La Louvre - but he was then restricted at every turn. La Louvre was the ideal location for the opening of the movie because it houses LEONARDO DA VINCI's masterpiece Mona Lisa, which is instrumental to the story. But the crew had to be painstakingly careful on the site, ensuring no lights were shone on any of the antique masterpieces, and many elements of the script had to be adapted. Howard says, "We had to be very specific about every single shot we were going to do, both for security and for preservation reasons. "There were all kinds of things we couldn't do. In the script, there is blood on the floor but we couldn't do that, and obviously we couldn't take paintings off the walls."