An important aspect of the Italian Renaissance was church reform. This book examines the nature of that reform - especially in Venice, Florence and Rome - as viewed through the unpublished manuscripts of a Venetian nobleman who became a Camaldolese hermit: Vincenzo Querini (1478-1514). This book sets Querini's personal journey to reform in the context of Venetian society, as well as against the backdrop of political crisis, cultural revival, and monastic renaissance in Italy generally. Querini's attempt to reform himself, the Roman Catholic Church, and the whole of Christendom are of interest to historians seeking to revise the chronology of early modern church reform since he employed a range of scriptural, humanist, conciliar, monastic, and mystical methods that had medieval antecedents but were also imitated by reformers after the Reformation.