In almost every episode there is a view of the front of the Halliwell manor. Well in a few episodes (at least "Coyote Piper," "Sin Francisco," etc.) someone (whether it be Piper, Prue, Phoebe, etc.) looks out the window in the attic and you can see the main road. Well, that window has stained glass but whenever you see the front of the manor there is no stained glass on any upper windows.