The Louvre Museum in Paris, France is unique for many reasons. To see everything in this museum, you'd have to walk more than eight miles. Kept here is one of the most famous paintings in the world, the Mona Lisa. This painting's fame is so incredible, she was once stolen from the Louvre. She also had a rock and even a mug of tea thrown at her! Most people have heard about the Louvre, but not everyone knows it wasn't always a museum. Read the story of the days before the Louvre held paintings. Those were the days of kings, Nazis, and even Vikings!