Historical shops
Characterised by their age which dates back at least fifty years, with a consolidated business history in the same retail sector and maintaining important original exterior and interior furnishings and fittings.

Shops with historical business
This category comprises shops which only partly maintain the features of historical shops. For example, businesses which have maintained the same retail sector and fittings but are still not old enough to qualify as historical; or shops which have older origins but have completely transformed their fittings and furnishings.

Traditional shops
These shops or craft workshops may not have historical features but their presence contributes to enlivening the commercial sector and quality of life or offer in a modern key traditional and specialised activities and retail practices that are unusual or of particular cultural or historical relevance (food shops, laundries, paint shops; barber’s, cobbler’s, tailor’s, carpenter’s or electrician’s shops; restoration businesses; marble, pottery, metal craft businesses, etc.).

Designer shops
Shops designed (until the late 1980s) by expert artists, architects or craftsmen who were able to create distinctive fittings and furnishings as a significant indication of the taste of a period or a historically identifiable aesthetic and stylistic trend, and which show particularly original furnishing solutions, use of materials, colours, graphic and design elements, etc.

Monuments of historical commerce
Examples of traces and expressions (independently of any alterations they have undergone) of a given moment in the history of commerce and local culture.

Invariants (exterior fittings)
These are elements of exterior fittings (like stone benches, wooden shutters, iron rooves, rostrums and gates, wooden and metal devanture, lighting elements, mobile shutters, gates with close-knit staves, decorations and signs) which characterize the commercial areas and consist of elements of architectural, historical and cultural value to be protected and conserved.

Invariants (interior fittings)
Elements of interior fittings (counters, display windows, decorations, tools, machinery and utensils etc) which characterize the commercial areas and consist of elements of architectural, historical and cultural value to be protected and conserved.

Districts
Urban areas which present territorial continuity and easily identifiable physical definition, with commercial businesses linked to a given historical period, city or commercial development or organic typological-design decisions.