The museum is pretty big and interesting but there...

The museum is pretty big and interesting but there are 2 down points. First, the entire second floor is closed, and they do not say why. Second, most of the museum is one way making it hard to get around. But other than that, safety measures are in place. The Mona Lisa is open, but is a bit overcrowded as well! Beware of pickpockets if the room is crowded.