French windows are a common architectural feature today. Crepe, Chiffon, Organza, Georgette have replaced heavy Cotton and royal silk curtains. The trend is beautiful. I am unsure of utility n durability but it looks mind blowing romantic.
Especially white organza with silver kairi design in Velvet. (visualise) I am willing to stitch one if I don't find it!
Biba, bed and bath, Zeba, Carmichael house... all of them have the most intricately styled curtains and drapes for your bed and your windows.