Bay windows are a type of window that protrudes from the exterior wall of a building. They are typically composed of three or more windows that are angled to create a protrusion from the wall. The term 'bay window' is derived from the French word 'ORIEL, ' which means 'bay window.' ORIEL windows are a type of bay window that is supported by brackets or corbels, and often feature decorative elements such as stained glass.