Italian bell heritage is extremely rich and varied, but also little known. It is not easy to classify the numerous traditional bell ringing cultures in Italy: although free-swinging bells are the most common, especially (but not only) in central and southern regions, some territories show different bell hanging styles, which are generally associated with specifically planned sets of bells and particular ringing techniques. Those campanological cultures can be defined as “systems”: some ringing techniques are possible only on specific sets of bells with precise hanging styles, which are conceived in order to make those ringing techniques possible.