Prison of the Holy Apostles Peter & Paul (Mamertinum)
The Mamertine Prison in Rome, with an altar commemorating the imprisonment of Saints Peter and Paul there

The Mamertine Prison (Italian: Carcere Mamertino), in antiquity the Tullianum, was a prison (carcer) with a dungeon (oubliette) located in the Comitium in ancient Rome. It is said to have been built in the 7th century BC and was situated on the northeastern slope of the Capitoline Hill, facing the Curia and the imperial fora of Nerva, Vespasian, and Augustus. Located between it and the Tabularium (record house) was a flight of stairs leading to the Arx of the Capitoline known as the Gemonian stairs.

The church of San Giuseppe dei Falegnami now stands above the Mamertine.[1]

Name and origin

The origins of the prison's names are uncertain. The traditional derivation of "Tullianum" is from the name of one of the Roman kings Tullus Hostilius or Servius Tullius (the latter is found in Livy, Varro, and also Sallust); there is an alternative theory that it is from the archaic Latin tullius "a jet of water", in reference to the cistern. The name "Mamertine" is medieval in origin, and may be a reference to a nearby temple of Mars.

According to tradition, the prison was constructed around 640–616 BC, by Ancus Marcius. It was originally created as a cistern for a spring in the floor of the second lower level. Prisoners were lowered through an opening into the lower oubliette.


Imprisonment was not a sentence under Roman statutory law,[2] though detention is mentioned in the Twelve Tables and throughout the Digest.[3] "Detention," however, includes debt bondage in the early Republic;[4] the wearing of chains (vincula publica), mainly for slaves; and during the Imperial era a sentence of hard labor at the mills, mines or quarries.[5] Slaves or lower-status citizens sentenced to hard labor were held in prison camps.[6]

Incarceration (publica custodia) in facilities such as the Tullianum was intended to be a temporary measure prior to trial or execution; abuses of this principle occurred but were officially censured.[7] Located near the law courts, the Tullianum was used as a jail or holding cell for short periods before executions and as a site for executions. In 63 BC, certain co-conspirators of Catiline, including Publius Cornelius Lentulus Sura, were held briefly in the Tullianum and executed there for their alleged plot to overthrow the government.[8] In this case, the executions were conducted hastily, without due process of appeal, during the consulship of Cicero, who was later exiled for his actions.[9] Sejanus was held in the Tullianum before his baroque execution, which involved the Gemonian stairs, and the conflicting accounts of the end of Pleminius include a timely death in jail during trial. Some Gracchan sympathizers ended up in the Carcer, where the haruspex Herennius Siculus hit his head on an architrave and died before he could be executed.[10]

There is no evidence that the Tullianum was used for long-term incarceration, and the lowest dungeon was unsuited for the purpose; the level above, however, in theory might have been.[11] In general, long-term incarceration was more widely practiced in the later Empire, and from the 4th century, under Christian rule, Roman laws and occasional personal intervention on the part of an emperor indicate a growing need to crack down on abuses such as filthy conditions and torture.[12]

In some cases, it is unclear whether a source using the word carcer means "the" Carcer, or imprisonment in some other facility. High-status prisoners, whether Roman or foreign, were typically held in the custody of individual Romans, sometimes at their homes or country estates. The line between being a war captive and a hostage lawfully held by treaty was thin, and conditions of captivity could vary widely, from abject misery and humiliation to relative luxury. As a prisoner of war, Perseus of Macedon was placed in a foul, overcrowded dungeon at Alba Fucens;[13] the son of Tigranes was kept at a praetor's house in Rome, where he could be trotted out as a dinner-party guest.[14] The Tullianum only rarely played a role in these detentions. Captured foreign rulers or generals were paraded in a Roman conqueror's triumph, and on a few occasions the "most prominent, famous, or dastardly" were executed afterward at the Tullianum.[15] These were "strikingly few" in number, and included the Samnite Gaius Pontius, the Gaul Vercingetorix, some "Cilician" pirates, and the Galatian Adiatorix.[16] Jugurtha, king of Numidia, may have been executed at the conclusion of Marius's triumph, or he may have died in prison several days afterward.[17] Most high-status war captives were neither executed nor held for any substantial length of time in the Tullianum.[18]

Christian significance

The entrance to the prison records that Saint Peter and Saint Paul were imprisoned there

It is not known when the prison went out of service permanently, but the site has been used for Christian worship since medieval times, and is currently occupied by two superimposed churches: San Giuseppe dei Falegnami (upper) and San Pietro in Carcere (lower). The Cross on the altar in the lower chapel is upside down, since according to tradition Saint Peter was crucified that way. It has been long referenced that St. Peter was imprisoned at the Tullianum, and that the spring in the bottom of the pit came into existence miraculously to enable him to conduct baptisms, but the Catholic Encyclopedia points out that the spring had existed long before, and that there is little first hand account of St. Peter's imprisonment there other than being the only single celled prison available for VIPs deemed threats to the state. Saint Paul's imprisonment is well referenced by his Roman citizenship and decree of execution by Nero.[19]

People imprisoned at the Tullianum

Gravestone in Mamertine Prison, with the names of illustrious prisoners who were locked up, awaiting execution.

See also


  1. ^ David Watkin, The Roman Forum (Profile Books, 2009) p. 128, ISBN 0-674-03341-8.
  2. ^ Richard A. Bauman, Crime and Punishment in Ancient Rome (Routledge, 1996), p. 23.
  3. ^ Fergus Millar, "Condemnation to Hard Labour in the Roman Empire, from the Julio-Claudians to Constantine," in Rome, the Greek World, and the East: Society and Culture in the Roman Empire (University of North Carolina Press, 2004), vol. 2, p. 131.
  4. ^ Edward M. Peters, "Prison before the Prison: The Ancient and Medieval Worlds," in The Oxford History of the Prison: The Practice of Punishment in West Society (Oxford University Press, 1995), p. 14.
  5. ^ Millar, "Condemnation to Hard Labour," pp. 123, 131 et passim.
  6. ^ Millar, "Condemnation to Hard Labour," p. 122ff.
  7. ^ Bauman, Crime and Punishment in Ancient Rome p. 23; Millar, "Condemnation to Hard Labour," p. 122 ("the carcer was employed for the retention of prisoners awaiting trial or punishment," but "any tendency for it to be used as a place of sentence was always resisted") and p. 130.
  8. ^ Watkin, The Roman Forum, p. 79.
  9. ^ Bauman, Crime and Punishment in Ancient Rome, pp. 27–38.
  10. ^ Ann Thomas Wilkins, "Sallust's Tullianum: Reality, Description, and Beyond," in Rome and Her Monuments: Essays on the City and Literature of Rome in Honor of Katherine A. Geffcken (Bolchazy-Carducci, 2000), p. 108.
  11. ^ Peters, "Prison before the Prison," p. 19.
  12. ^ Peters, "Prison before the Prison," pp. 19–22.
  13. ^ Peters, "Prison before the Prison," p. 18.
  14. ^ W. Jeffrey Tatum, The Patrician Tribune: Publius Clodius Pulcher (University of North Carolina Press, 1999), p. 170.
  15. ^ The Roman triumph emphasized splendor and the nobility and ethnicity of captives, sometimes in chains, sometimes not: "The successful general accrues little glory for representing his victory as won by thrashing a mangy band of feeble and unimpressive suppliants. The best conquests are won against tough and worthy opponents, not against those who look as though they could not have put up much of a fight in the first place." For an overview, see Mary Beard, The Roman Triumph (Harvard University Press, 2007), chapter 4, "Captives on Parade," pp. 107–142, quotations on pp. 128 and 134.
  16. ^ Beard, The Roman Triumph, pp. 129–130.
  17. ^ Beard, The Roman Triumph, p. 130.
  18. ^ Beard, The Roman Triumph, pp. 128–131. Some were released, either becoming part of Roman society or returning home to rule as a Roman client. Others might be kept in custody as they were before the triumph, that is, not in the Tullianum or any other dungeon, but under the close scrutiny of Roman officials and away from other prisoners they might incite: Beard, The Roman Triumph, pp. 134–137 et passim.
  19. ^ Maurice Hassett, "Mamertine Prison," in The Catholic Encyclopedia (New York: Robert Appleton Company, 1910), vol. 9, New Advent edition online.
  20. ^ Squires, Nick (25 June 2010). "Archeologists find evidence of St Peter's prison". Retrieved 22 December 2018.
  21. ^ Laney, J.C. (2019). "Paul's Travels After Acts (Rom 15:24; Phil 1:25; 2:24; Phlm 22; 1 Tim 1:3; 3:14; 2 Tim 1:16–17; 4:6–8,13,20; Titus 1:5; 3:12)". In Beitzel, B.J.; Parks, J.; Mangum, D. (eds.). Lexham Geographic Commentary on Acts through Revelation. Bellingham, WA: Lexham Press. p. 461.

41°53′36″N 12°29′04″E / 41.89333°N 12.48444°E / 41.89333; 12.48444