It is a dungeon in the ancient Roman era. It is a prison guarded by the patron saint Peter and Paul of Rome. It is said that Christianity later built a church in Rome and it is also the oldest prison in Rome. It is now the Karl Tulianum Museum. A history of prison, the ticket is ten euros.
This is the Roman prison where the Apostle Paul likely spent his last days, though not the Apostle Peter. For a Christian, it's definitely very moving.
This prison has a high degree of historical burden, especially for Christians because it was there that they say the apostles Paul and Peter spent their last days. It is located below the church of San Giuseppe dei Falegnami in Rome.
Located under the church of San Giuseppe dei Falegnami, dating back to the 16th century, is the Mamertine Prison (originally called Tullianum), which, according to Christian legend, was the place where Saints Peter and Paul were imprisoned. It is also said that they caused a spring in their cell and that they used the water to baptize the prison guards. The prison was located in an old cistern and gave access to the city's sewer system (the Cloaca Maxima). The lower cell was used for executions, and the bodies of those killed were then thrown directly into the sewers. The prisoners received no meals and often starved to death. There is no explanation as to why the prison fell into disuse, but there is evidence that the site was used for Christian rituals starting in the Middle Ages.