Distribution of prisoners in hard prison regime in Italy 2020, by group affiliation

As of December 31, 2020, there were 759 inmates in hard prison regime in Italy. Known in Italian as 41-bis from the law establishing its existence, hard prison regime comprises a number of preventive isolation measures. These measures have the purpose of severely restricting prisoners' interactions with the outside world. Hard prison regime is aimed especially at high-profile convicts belonging to organized crime or terrorist groups. The final goal is to prevent these people from leading and commanding new criminal activities from their confinement.
According to the data, members of Camorra, Ndrangheta, and Cosa nostra made up for the largest part of 41-bis inmates. These are the three most powerful Mafia organizations in Italy, historically situated in the regions of Campania, Calabria, and Sicily, respectively.