Cornices or crown molding are placed at the intersection of the wall and soffits. They are also known commonly as crown moldings, and can aid in hiding the unsightly joint between the roof and wall. Stucco cornices ease the transition between your wall and soffit by providing an aesthetic change from vertical to horizontal surface. Stucco cornices can also help brighten the top of your exterior wall by ambiently reflecting light, keeping the area where the crown molding goes from being just a dark shadow.