Lightwell
In architecture, a lightwell, light well or air shaft is an unroofed external space provided within the volume of a large building to allow light and air to reach what would otherwise be a dark or unventilated area. Lightwells may be lined with glazed bricks to increase the reflection of sunlight within the space.
Lightwells serve to reduce the necessity for electric lighting, add a central space within the building, and provide an internal open space for windows to give an illusion of having a view outside.Area or areaway
A subterranean lightwell at the front of a building to provide light to a basement is called an area.Ancient history
The lightwell was used in ancient civilizations, such as the Egyptians and at the Palace of Knossos on Minoan Crete. There are also instances of lightwell use by the Romans.
