A window near the top of an outside wall.
In architecture, a clerestory (/ˈklɪərstɔːri/ KLEER-stor-ee; lit. ’clear storey’, also clearstory, clearstorey, or overstorey; from Old French cler estor) is a high section of wall that contains windows above eye-level. Its purpose is to admit light, fresh air, or both.
Historically, a clerestory formed an upper level of a Roman basilica or of the nave of a Romanesque or Gothic church, the walls of which rise above the rooflines of the lower aisles and which are pierced with windows.
Structures with the designed purpose to provide additional lighting or ventilation by allowing heat to escape or light to enter. As such they fall under Gepetto’s expertise in Historic Windows