Salvi published in 1625 by Leandro Pizzoni has been totally neglected in Galilean scholarship because of serious misunderstandings about its authorship, nature and scope. This essay calls attention to this text and shows that - however inept and heavily reliant on previous sources, such as Orazio Grassi and Francesco Sizzi - Pizzoni’s criticism of Salvi is historically interesting because it provides evidence of the reaction of a conservative Aristotelian against several aspects of Galileo’s teachings. Not content with criticizing Salvi’s Atomism, Pizzoni openly attacks Galileo’s scientific reputation, describes his way of philosophizing as "extraordinary", and refutes his astronomical discoveries, recalling that they had been badly received at the University of Padua. Moreover, Pizzoni praises Aristotle in terms that are strikingly similar to those employed by Galileo when penning a satirical portrait of dogmatic Aristotelians in his Dialogue on the Two Chief Systems of the World.
Keywords: Leandro Pizzoni, Costanzo Salvi, Galileo Galilei, Cesare Cremonini, Renaissance Aristotelianism, telescopic discoveries