The 41 bis regime prisons in Italy, are they similar to the Supermax prisons in USA? I find it wierd that in Italy where there is so much corruption and the Mafia has such power these prisons exist.
The prisoners are kept in isolation for 22 hours a day,  except one hour in the open air in a cage and another one for limited contacts with three others selected prisoners. They have a right to a one-hour-long family visit per month behind a glass partition or, alternatively, to a 10-minute phone-call. Communication with legal advisers is also restricted.
In Holland we have one extra secure prison with a similar regime.