Since 3000 years ago, oriental civilisation let the first traces of rough bells, but is also possible to ascribe this discovery to S.Paollno, Bishop of Nola, about in fifth century A.C. Today, like in that time, the loam casting method concept is the same, but with the aid of modern machinery is possible to comfort the men's manual hard work. Building the bell is based on a three stages procedure: the preparation of the male, of the model and the cover; putting in a hole, covered, holding the melted bronze and after a long natural cooling time, the extraction of the bell for the cleaning operation. The bells production needs, as told, the preparation of the clay model where are disposed images, wordings and decorations made with the method of wax to loose. This step, more artistical than technical will do to the bell a personal and unique identity. The musical aspect, not less important, concerns the perfect tuning between more bells (concerts). As a matter of facts every bell plays a specified note, like a musical instrument, while the timbre is defined by the quality of the alloy and by the profile. The fascination of this job is unique, it is a fusion of technical, artistical and religious components. Like in the expressions of famous past men during the centuries, marking the way of our civility, the secret of the art of our work is hold in the earth, mother of millenary culture.