For any costume designer making non-replica version of the musical Notre Dame de Paris...
If you are using "timeless" design for that musical, use something like Carlotta´s sumptuous costume in The Phantom of the opera: red and black, velvet, lace and roses. Yes, it´s too mature, too pure, too whatever, but it looks BEAUTIFUL. After all, lyrics tell about "rainbow skirt", not ugly bathrobe. And please, PLEASE don´t bleat any rubbish about "she needs pure youthful color!" First: youth is less pure than cesspool, and if red roses make your mind jump to sewer more than ugly bathrobe... well, problem is not mine.