Plan your visit to the Louvre in the evening. Check the closing times on the days you want to be there, and show up a few hours before it closes. See everything else on your list first. Then, go see the Wedding of Cana. It’s on the wall opposite the Mona Lisa, and is one of the biggest and most impressive pieces of art in the museum (or in any museum, for that matter). Then wait for the crowd on the other side of the room to start dissipating. Once it does, take some time to appreciate Da Vinci’s masterpiece.