The pelota fronton is a crown made of a molded frame and a tympanum : the tympanum can be more or less perforated, occupy only a part of the surface delimted by the frame, or be reduced to a network; the frame is formed of a cornice and two crawling (crawling cornices). Generally crawling are the same as the cornice molding, without cyma. The base can be interrupted, but do not confuse the pelota fronton (which has a horizontal molded base) and cornices miter or semicircular (covering non delimited down tympanum).