A cornice is a decorative and functional horizontal molding that crowns the top of a building's exterior wall or an interior room's ceiling line. Originating from classical architecture as the uppermost section of the entablature, it projects outward to serve the practical purpose of directing rainwater away from the building facade, thereby protecting the structure from water damage. Beyond its utility, the cornice adds significant aesthetic value by creating depth, shadow lines, and a finished architectural transition between the wall and the roof. While historically crafted from stone or wood in various styles ranging from simple box cornices to ornate designs featuring brackets and dentils, modern versions are often made from lightweight, durable materials like polyurethane or fiberglass to enhance curb appeal and define a building's character.