In 1764, the work entitled Dei delitti e delle pene by Milanese nobleman Cesare Beccaria (1738-1794) was printed anonymously in the Italian city of Livorno. Different editions and translations of this book followed quickly, in which the author added new chapters and made different changes. The Spanish translation offered here in the open comes from the fifth edition, assumed by Beccaria as the authentic one, who wrote for her a new warning To the reader, the Introduction and two unpublished chapters (Del fisco and Del perdón), thus reaching 47 chapters; It also introduced various corrections, clarifications and rectifications, such as the one noted in Chapter 34.