I think this type of bag is fashionably called a 'museum tote'.
They are sold at museum shops.
I go to museums not only in France but all over Europe, and when I find a museum tote with good taste, I want one.
But I don't often buy them because I think I won't use them and I don't want to add to my luggage during the trip.
Also, the prices are quite high.
I often feel that the price is a bit out of proportion to the material, as they are all made of the same thin cotton material.