There is something in the world whose birth we can say has remained unchanged in the years and whose material has assumed for this reason hidden moral meanings: it is the bell. A worning for people, the admonition of God, it received, in the life of man and in different cultures, only apparently distant meanings. With their tinklings they performed protective and evocative functions to gods, to avert evil forces and to approach good ones. Among Hebrew people already existed the "tintinnabulum", little bells which adorned priestly garments; they existed also among the Romans and they rose over public buildings to tell the time of public offices.

But the scholars don't know the inventor of the first bell and little bells yet. Without dwelling upon this question we can say that many people say it was S. Paolino from Nola, in 420, to enlarge the little bells hanging them to a tower and using them for holy offices. The tower or bell-tower, perfectly square shaped, with 18 hands in bredth in every broad, 100 hands in height and 3 arrangements of windows, the one corresponding to the other and to the four parts of the world.
It was erected near the sanctuary of S. Felice basilica in Pincis. The first bell-tower and the first bell of Christianity were made in Nola, in fact at the beginning the bell was defined Nolanae" and the bell-tower was defined "Nolarium" as Pope Urbano VIII called it.

Than the Venerable Beda used the word "campana" deriving from the native land of the most melodious instrument the world had ever known and man had ever produced with weary labour. In 550 the bell was already spread all over Italy and soon after it spread all over the West. The use of bells, considered the symbol of Christianity, is defined in the following hexametres: Laudo Deum verum, plebem voco, congrego clerum, defunctos ploro, nymbos fugo, festaque honoro. That is: to praise God, to call the people, to congregate the clergy, to mourn over dead persons, to remove calamities, to honour feasts.