The Mona Lisa, a gold toilet and now the Louvre’s royal jewels: a fascinating history of art heists

The world’s largest art museum, the Louvre, has approximately half a million objects in its collection, with about 30,000 on display, and sees on average 8 million visitors per year. That’s big on any scale, with a lot of people and objects to keep watch over. And Sundays are particularly busy.