Temple of Janus (Roman Forum)

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Image of the Temple of Janus on a coin from the reign of Nero (54-68 AD). Note the ornate roof decoration, latticed window (left), and garland hung across the closed double doors (right).

In ancient Rome, the main Temple of Janus as it is often called, although it was not a normal temple, stood in the Roman Forum near the Argiletum. It had doors on both ends, and inside was a statue of Janus, the two-faced god of boundaries. The doors (the "Gates of Janus") were closed in times of peace and opened in times of war.[1]

According to Livy 1.19 the second king of Rome, Numa Pompilius, decided to distract the early, warlike Romans from their violent ways by instilling in them awe and reverence. His projects included promoting religion, certain priesthoods, and the building of temples as a distraction with the beneficial effect of imbuing spirituality. The Janus was Numa's most famous architectural project.

Ancient descriptions[edit]

Plutarch, in Life of King Numa, wrote:

[Janus] also has a temple at Rome with double doors, which they call the gates of war; for the temple always stands open in time of war, but is closed when peace has come. The latter was a difficult matter, and it rarely happened, since the realm was always engaged in some war, as its increasing size brought it into collision with the barbarous nations which encompassed it round about. But in the time of Augustus it was closed, after he had overthrown Mark Antony; and before that, when Marcus Atilius and Titus Manlius were consuls, it was closed a short time; then war broke out again at once, and it was opened.[2]

Gates of the Janus[edit]

During Numa's reign, the Gates of the Janus were closed and Rome remained at peace. The next king, Tullus Hostilius, opened the Gates of the Janus when he went to war with Alba Longa. The Gates of Janus remained open for the next 400 years until after the First Punic War when T. Manlius Torquatus closed the Gates of the Janus in 235 BC. This closure lasted about eight years. War with the Gauls in Northern Italy forced the Gates of the Janus to reopen. They did not close again until 29 BC, following the deaths of Antony and Cleopatra.[citation needed]

The Res Gestae Divi Augusti, a first-person account of the life of Augustus, claims:

The Janus Quirinus, which our ancestors wished to be closed whenever peace had been secured by victories throughout the Roman empire by land and sea, was recorded to have been closed, before I was born, twice altogether since the foundation of the city, but the senate decreed that it should be closed on three occasions while I was princeps.[3]

From Cassius Dio 51.20 and 53.27 we are able to date the first two closures in Augustus's reign to 29 and 25 BC respectively. The exact date of the third closure remains a matter of scholarly debate. The only ancient author to date it was Orosius,[4] who associates the event with the birth of Christ, traditionally (but probably incorrectly assigned to December 1 BC. However, modern scholars almost universally reject Orosius because Roman armies were campaigning in Germany and/or the Far East at this time. Inez Scott Ryberg and Gaius Stern date the third closure more plausibly to 13 BC based on the joint return of Augustus and Agrippa to Rome after pacifying the provinces.[5] Sir Ronald Syme[6] dated the closure to 7 BC, to coincide with the triumph of Tiberius and his second consulship, the events of which year are lost in a gap in the surviving manuscripts of Cassius Dio. Mario Torelli followed Orosius' date.[7]

Nero coin: Obverse: Nero; Reverse: Ara Pacis

Later emperors also closed the Gates of the Janus to great fanfare. The most famous closures occurred under Nero and Vespasian. Nero minted a large series of coins with the Ara Pacis (and the Janus itself with closed gates) on the reverse to commemorate this event. Other emperors certainly closed and reopened the Gates of the Janus, but references in later and less thorough historians are fairly rare.

The Roman poet Virgil included in the Aeneid the opening of the Gates of the Janus to start war between the Trojans and the Latins.[8]

Modern ruins[edit]

Today, the scant remains of the temple lie beside the Basilica Aemilia, at the foot of the Argiletum, in the Roman Forum.

See also[edit]


  1. ^ Green, S. (2000). "Multiple Interpretation of the Opening and Closing of the Temple of Janus: A Misunderstanding of Ovid "Fasti" 1.281". Mnemosyne. 53: 302.
  2. ^ Plutarch's Lives Volume 1
  3. ^ Res Gestae Divi Augusti, paragraph 13, translation from Wikisource
  4. ^ Orosius In Paganos 6.22
  5. ^ Inez Scott Ryberg, "The Procession of the Ara Pacis," MAAR 19 (1949), 77-101; Gaius Stern, Women, Children and Senators on the Ara Pacis Augustae (Berkeley diss. 2006), and "How Many Lictors are on the Ara Pacis Augustae?" CAMWS 2007
  6. ^ Ronald Syme History in Ovid (1977), 24 ff, and "Problems with Janus," AJP 100 (1979), 188 ff
  7. ^ Mario Torelli, Structure and Typology of Roman Historical Reliefs, (1982) Chapter 2: “A New Start: The Ara Pacis Augustae"
  8. ^ Vergil Aeneid 7

Further reading[edit]

  • Castagnoli, Ferdinando. 1988. “Gli iani del Foro Romano. Ianus arco quadrifonte?.” Bullettino della Commissione Archeologica Comunale di Roma XCII: 11-16.
  • Claridge, Amanda. 2010. Rome: An Oxford Archaeological Guide. 2nd ed., revised and expanded. Oxford: Oxford University Press.
  • Coarelli, Filippo. 2007. Rome and Environs: An Archaeological Guide. Berkeley: University of California Press.
  • DeBrohun, Jeri Blair. 2007. “The Gates of War (and Peace): Roman Literary Perspectives.” In War and Peace in the Ancient World, Edited by Raaflaub, Kurt A. The Ancient World. Comparative Histories, 256-278. Oxford : Blackwell.
  • Staccioli, Romolo Augusto. 1985. “A proposito di una ricostruzione « grafica » del sacello di Giano all'Argileto.” Archeologia Classica 37: 283-289.
  • Townend, Gavin. 1980. “Tacitus, Suetonius and the temple of Ianus.” Hermes CVIII: 233-242

External links[edit]

Coordinates: 41°53′34.73″N 12°29′8.60″E / 41.8929806°N 12.4857222°E / 41.8929806; 12.4857222