The Clauzetto stone and its presence in the built heritage of NE Italy.

Clauzetto stone is a pale brown fossiliferous limestone, quarried in limited quantities in the western piedmont area of Friuli Venezia Giulia Region. Despite the rare presence in the national built heritage, it represents a relevant element of identity in its NE area, where it has been widely used in Renaissance, by Lombard sculptors, and in the XX century, when it has been chosen by architect Carlo Scarpa for important masterpieces, as Verona’s Castelvecchio renovation works and Olivetti Shop in Venice. Historical quarrying sites has been identified by recent studies, based on extended archives research and references evidences analysis, supported by on-site surveying campaigns, allowing to provide a complete description of the supplying contest and to create a link among artefacts and quarries, from the past to present times. Based on that, the mapping of Renaissance masterpieces realised in Clauzetto stone has been fruitfully carried out by art historians. Besides, the research has given evidence of the relevant use of Clauzetto stone in the contemporary built heritage. The contribution provides a description of the results of these activities, filling a gap of knowledge for a niche stone of national built heritage, but not for that without interest.