Cap off your look with the perfect crown moulding. A great crown is the royal wrap-up of all your moulding decisions. A moulding designed to sit at an angle between the wall and ceiling. They are sometimes referred to as a cornice. Crown moulding has many uses – it can be integrated into the architrave or header over a door or window, as part of the mantel on a fireplace surround, or to encase the top of a column.