A cornice is a decorative architectural feature that typically crowns a building or a room. It is often found at the top of walls, where they meet the ceiling, and can be made from various materials such as wood, plaster, or stone. Cornices serve both aesthetic and functional purposes, helping to direct rainwater away from the building's facade. In addition to their use in architecture, cornices can also be found in window treatments, where they are used to conceal curtain rods or blinds. This type of cornice adds a finishing touch to interior design, enhancing the overall appearance of a room while providing a polished look.