In the book which bears the text (in Latin and Italian) of the medieval Statutes of the City of Sacile, the 'Introduction' is "unusual in size and content" and as one "would be a monograph, and even the most meager." Start with the "explanation of the legal relationship historically existed between the community of Sacile and the Parliament" of the" Patria of Friuli, "which examines the structures and powers from the beginning until its annexation in Venice ... The result is a convincing and 'complete' proposal, which the previous contributions had failed to develop". The work "then enters the heart of the matter, taking up the theme of the legal Sources in their relationship between central and local Law, that's the Venetian one ... Are pages that are of particular importance in the context of the speech, so here more than anywhere else we can grasp the logical path of the author, a direct consequence of its professional 'habitus'; Mazzarolli proceeds by analysis ... up to do not leave anything unexplored ... The 'Introduction' for quantity (size) and quality (learning and interpretive subtlety ) is, as far as I know, a 'unique' in its kind ... it comes out exhausted but enriched by what is a real service to scholars more demanding ... "(Joseph Gullino).