Churches often have windows of stained glass that they'd like to remain undamaged, so the glass is covered with a transparent cover that does not open. Of those

Churches often have windows of stained glass that they'd like to remain undamaged, so the glass is covered with a transparent cover that does not open. Of those church buildings not old enough to utilize a lot of stained glass, the ones I've seen are built like office buildings: windows don't open. But as sibling comments point out, your comment is missing a lot of subtleties. Starting, IMO, with the difference between an apple and an orange.