A parapet is the continuation of an exterior wall above the surface of a roof, terrace, balcony, walkway, or other structure. Originally, they were to be used to defend buildings from military attack, but today they are used predominantly as guard rails and to prevent the spread of fires.
Parapets may also be a vertical feature such as a fire wall or party wall, which are primarily beneath the roof line.
Built between 477 and 495 AD, the Mirror Wall at Sigiriya, Sri Lanka is one of the few long-surviving protective parapet walls and is approximately 250 meters long.
Stahl completed the rooftop parapet wall for the 41,129-square-foot addition as part of the dual-branded Hilton Tru / Home2 Suites hotel in downtown Minneapolis.