If you visit Paris, you will most certainly go to ...

If you visit Paris, you will most certainly go to see Galeries Lafayette.
Several connected buildings where you will find women's, men's, children's, sports, restaurants ...
In particular, what I liked the most was the decoration of the central tree that they had put up for Christmas (I don't know if they will have any other special decoration during the year) and the views from the roof.

I give it three stars, valuing it from the tourist point of view. At a commercial level, if what interests you is buying clothes, a 5.