1) Clerestory 2) Window 1) Clerestory 
• (n.) Alt. of Clerestory
In architecture, a clearstory is an upper story, or row, of windows in a Gothic church, tower, or other erection rising clear above the adjoining parts of the building. In churches it appears to have been adopted as a means of obtaining an increase of light in the body of the building; but the windows are not infrequently so small that they serve t...
clerestory.