In building and architecture, the fleur-de-lis is often placed on top of iron fence posts, as a pointed defence against intruders. It may ornament any tip, point or post with a decorative flourish, for instance, on finials, the arms of a cross, or the point of a gable. The fleur-de-lis can be incorporated in friezes or cornices, although the distinctions between fleur-de-lis, fleuron, and other stylized flowers are not always clear, or can be used as a motif in an all-over tiled pattern, perhaps on a floor.