Clerestory (noun) In architecture, a wall rising above adjacent rooftops and having windows admitting daylight to the interior. A common feature of Gothic and Romanesque cathedrals, a clerestory provides light and air to what otherwise may be dark spaces. A clerestory may also be a design feature of modern homes.
Originating in the 14th / 15th century, from late Middle English.
Norwich Cathedral, a view of the clerestory of the choir. When the Norman spire of the cathedral blew down in 1362, it damaged eastern parts of the building. As a result, the clerestory of the choir was rebuilt in a Perpendicular (Gothic) style.
An interior view of a clerestory in Malmesbury Abbey
An example of a modern application in an Arizona adobe home, photo taken from http://www.joyrobichaud.com
And, finally, from the archives of my ‘one day, when I win the lottery/write a bestseller/discover gold in the garden’ scrapbook:
photo taken from interiorstyledesign.tumblr.com