The analysis of this particular house of correction concentrates on the microhistory of its daily routines, in line with the theory that understanding institutions of confinement requires detailed knowledge of what goes on inside, of social relations from the bottom up and from within. The Casa di Correzione was a prison, with a cellular structure and noteworthy architecture, that was reserved exclusively for minors. Inside the institution, the concept of punishment was joined with that of rehabilitation, which was to be achieved through work and a disciplined life style based on isolation at night and silence during the day. These elements were later developed in the context of enlightened criminal reforms, and were brought together for the first time in an architectural structure conceived for that specific purpose. The chapter includes details of the institution's architecture, the principles that inspired the design, uses of interior structures, and how later architects and planners drew inspiration from the original corrections house. Notes, figures, tables