The Louvre is the largest museum in the world – so big that it’s impossible to see all the museum has to offer in one visit. How long would it actually take? Well, if you had 100 days to spare, you could probably squeeze in every piece of art, but you could only spend 30 seconds on each piece – and that’s if you were there all day, every day. The museum offers 380,000 pieces in total – but not all of the collection is exhibited to the public.  In fact, there are plans to open a second Louvre Museum in Dubai with the ample undisplayed artwork.