Regina Coeli is the best known prison in the city of Rome. Previously a Catholic convent, it was built in 1654 in the rione of Trastevere. It started to serve as a prison in 1881.
The construction was started by Pope Urban VIII in 1642, but his death stopped the works and the complex remained unfinished. Between 1810 and 1814 the former Catholic convent was confiscated by Napoleonic French forces, who suppressed all religious orders in territories under French control during the Napoleonic Wars. While the complex was returned to Carmelite nuns shortly afterwards, they abandoned the convent in 1873. The newly established Kingdom of Italy confiscated the complex and decided to turn it into a prison in 1881. The refurbishing was carried out by Carlo Morgini and was completed only in 1900. A new complex housing a prison for women, dubbed "Le Mantellate" was erected nearby on a place also formerly occupied by a Catholic convent. Regina Coeli replaced the Carceri Nuove as Rome's primary jail.
Wikipedia https://en.wikipedia.org/wiki/Regina_Coeli_(prison)
Official Website https://www.giustizia.it/giustizia/it/dettaglio_scheda.page?s=MII180401
Coordinates 41°53'42.528" N 12°27'49.687" E