If you didn't know already you can download the map of Paris on your smart phone offline with google maps.
1) Install google map app on your smart phone if you don't have it
2) search for Paris
3) write this key word in the search bar "ok maps"
4) Google might ask you to login if you are not logged in already
5) center the map on Paris and hit the dowload button at the bottom
https://drive.google.com/open?id=1--zuq0LotKFVrkd04S8bZ0PPVVo&usp=sharing