You may be interested in previous answers here:
And
https://www.reddit.com/r/AskHistorians/comments/4i6da4/how_did_canons_change_city_defenses/
Between the two of them they cover things quite well unless you have a really specific definition of "wall".
You should clarify the question if you are asking specifically about city walls or city fortifications that involved walled structures such as star forts or ramparts.