A canopy is an overhead structure typically intended to provide shelter from rain or sun. It is usually seen as a covering attached to the outside of a building. It is also used for decorative purposes and to emphasize a route or part of a building. 

Canopies can be built either through gable construction or flat roof construction. Gable construction involves making a self-supporting structure. In flat roof construction, the canopy is constructed flat where single metal plates or glass plates are used as a canopy.