"Bûche de Noël", a type of sweet roulade,is a
traditional Christmas dessert in France. During Christmas time you can see them in different sizes and sometimes even with the most fancy decorations in every boulangerie/pâtisserie.
During my recent trip to Paris I´ve seen a lot of Christmas trees on squares and in front of "important" buildings, but the trees in front of the "mairie" of the 3rd arrondissement were the most beautiful.