Word describing windows that are too high to see the ground outside?

There is a word, I believe it starts with a 'c', that describes windows whose function is to provide light or create a feeling of openness rather than to see outdoors because they are so high that seeing out of them isn't feasible. Here is a picture of a church containing windows of this type:

enter image description here

Thank you!


Solution 1:

You are close. You are thinking clerestory.

In architecture, clerestory (/ˈklɪərstɔri/; lit. clear storey, also clearstory, clearstorey, or overstorey) are any high windows above eye level.

http://en.wikipedia.org/wiki/Clerestory