if i only had two days for my next visit to one of my favorite cities. each cultural institution is matched with a restaurant, a bar/café, and/or nearby shops.
when the weather is nice, i can't imagine anywhere else to go before or after the louvre. coffee can be purchased at the télescope on rue villédo, then go here!
farmer's market. check for dates. might be sundays only, but i'm not sure. if closed, then Beaucoup, a café on 7 rue Froissart, is a solid alternative for food.
hard to choose between this and Musée de la Mode et du Costume, not to mention Museé du Quai Branly, but i love this modern art playground that stays open late.