One thing you should have to do when you are in Paris, is visiting 'Le Marais'. Not only because it's a cosy neighborhood,
and because you can shop-till-you-drop even on sundays. But because you can eat delicious falafel-take-away.
I really adore it.
My favorite address is the falafel bar in Rue Pavée. You can eat your falafel in front of the oldest synagogue of Paris that is
really famous by his architecture (or that's what I heard a guide tell when she was looking at the building where I ate my falafel).
You should go there.
Metro : Saint - Paul