Paris 2 - Louvre

I hope the queue is not too long at the 'pyramid' entrance...
After going down better study the museum leaflet first (preferably around a nice cup of tea in one of the cafes around the ticket vendors) and choose the areas or paintings you really like and keep to those!

http://www.louvre.fr/llv/commun/home_flash.jsp

The Tuilleries Gardens are nearby for a rest among the statues after the exhaustion of visiting the Louvre ;)