This chapter traces the rediscovery and reuse of the twelfth-century customary (Consuetudines) of Bernard of Cluny during the Early Modern period. Tracing the copies and editions that emerge, this study explores how early Modern monks sought to redefine the medieval sense of custom as a juridical analog to modern laws. This redefinition has had a serious impact on how modern scholars have understood the use and the authority of written Cluniac customs and statutes.