Ancient Roman religion

Overview

Ancient Roman religion was the public and household worship by which Romans believed they kept the pax deorum, a negotiated peace between their city and its gods. It had no founder and no creed: provided a Roman performed the correct rites, what he privately believed mattered little. Its core grew from Latin and Sabine farming villages fused with the more ritually anxious Etruscans to Rome's north, then absorbed Greek gods and myths as the city's power spread. Unlike Greek religion, from which it borrowed many myths and rites, Roman religion fixed its attention on exact ritual performance over storytelling, and it organized worship through priesthoods answerable to the state. Reshaped under the emperors by the cult of deified rulers and by eastern mystery religions such as Mithraism, it continued until Christian emperors ended public pagan cult.^{[1–3, 7–8]}

History

Villages, numina and Etruscan kings c. 753–509 BCE

By tradition Rome began in 753 BCE, but archaeology instead shows Latin and Sabine farming villages merging on Rome's hills from the early 1st millennium BCE, with the Forum Romanum becoming their shared marketplace by about 575 BCE. Early Romans venerated divine power, numen, in functions and objects rather than telling myths about personal gods: opening a door, a boundary stone, a spring could each carry its own numen, addressed carefully by name or, if unsure, as 'whoever you are.' From about 575 to 509 BCE Rome came under Etruscan kings, remembered as the Tarquins, whose intensely ritualistic culture gave Roman religion its temple architecture, its calendar and its first anthropomorphic cult statues, including the image of Jupiter made for the great Capitoline temple shared with Juno and Minerva.^{[4, 7–9]}

A conservative Republic absorbs Greek gods 509–218 BCE

After the kings were expelled, Rome kept importing Greek religious customs through contact with the Greek colony of Cumae, adopting cults such as Apollo and Ceres and borrowing rites like evocatio, which invited a conquered town's patron god to move to Rome, and lectisternium, in which paired images of gods were feasted as honoured guests to calm a crisis. The state's priesthoods, headed by the pontifex maximus, kept the religious calendar and the formulas for prayer and sacrifice, while augury (reading the flight of birds) and haruspicy (reading the liver of sacrificed animals, an Etruscan-derived art) judged whether the gods approved a given action.^{[5–6, 10–12]}

Crisis religion and new gods 218–31 BCE

Hannibal's invasion of Italy triggered a wave of new, more emotional cults: the Senate brought the Anatolian goddess Cybele to Rome in 205–204 BCE on the advice of the Sibylline Books, then moved in 186 BCE to suppress the ecstatic worship of Bacchus as subversive, even though mystery cults promising an afterlife had already come to stay. During the same crisis, a lectisternium carried twelve Greek and Roman gods side by side in procession, a visible sign that Roman religion had become thoroughly Greco-Roman. Stoic philosophy, newly fashionable among the educated elite, reinforced belief in Fate and Fortune and made the human soul part of a universal divine order.^[13–16]

Emperors, mystery cults and Christianization 31 BCE–392 CE

After the civil wars, Augustus revived the neglected state cults and, building on earlier honours paid to Julius Caesar, let himself and later approved emperors be formally deified after death as divi, objects of veneration rather than prayer. As the empire's religious centre of gravity shifted east, mystery religions devoted to Isis, Cybele and the Persian god Mithras, together with sun worship, became the most vigorous forms of paganism; the emperor Aurelian built a temple to the 'Unconquered Sun' in 274 CE. Constantine's conversion began a gradual process from 312 CE by which Christianity became the empire's official religion, and public pagan rites were banned by the end of the 4th century, though rural festivals and magical practice lingered for generations.^{[2, 17–19]}

Key moments

1. c. 753 BCERome and the sacred fire · Rome
2. 313 CEThe Edict of Milan · Milan and Nicomedia (İzmit)
3. 380 CETheodosius makes Nicene faith the law · Thessalonica

Beliefs

numen

divine power in an object or act

A numen was the sacred power Romans sensed in a specific function, place or object — a doorway, a spring, a boundary stone — rather than a personal god with a biography. Multiplying numina to cover nearly every act of life, early Romans addressed each by its correct name, or cautiously as 'whoever you are,' to be sure a prayer found its mark. This habit of mind, not storytelling, was the oldest layer of Roman religion, and it helps explain why, unlike the Greeks, Romans originally had next to no mythology of their own.^{[8, 20]}

pax deorum

the peace of the gods

The pax deorum was the cooperative, benevolent relationship Romans believed they could secure from their gods through exact ritual, sacrifice and prayer, resting on mutual trust (fides) rather than divine grace. Keeping it was the point of Roman religion: disaster was read as a sign that some rite had been neglected or performed wrongly, and the response was not repentance but correction of the ritual.^[3]

divine qualities · Fides, Victoria, Concordia

worshipped abstractions

Romans worshipped qualities such as Fides (good faith), Victoria (victory), Concordia (harmony) and Pietas (dutifulness) as real, external divine powers rather than mere figures of speech; Concordia received Rome's first known temple to such a quality in 367 BCE, and the practice grew through the Republic as the state fostered cults that bound citizens to its interests.^[15]

Practice

Sacrifice and prayer

Worship centred on animal sacrifice — chiefly pigs, sheep and oxen — together with incense, libations and first fruits, always paired with prayer spoken in exact traditional wording, since a misspoken formula could void the rite. The sacrificed offering was thought to 'feed' and strengthen the god, accompanied by phrases such as macte esto, 'be increased.' Magic, aimed at coercing rather than persuading the gods, persisted alongside official ritual despite periodic legal efforts to restrain it.^[21]

Evocatio and absorbing foreign gods

Rome regularly folded outside cults into its own through rituals such as evocatio, which formally invited a defeated enemy's patron deity to relocate to Rome with full honours, and through state-sponsored introductions such as that of Cybele, acquired on the Sibylline Books' advice during the war with Hannibal. This let Rome treat conquest as religiously safe while steadily enlarging its pantheon.^{[13, 22]}

State priesthoods and the calendar

Religious authority sat with state priesthoods rather than independent clergy: Roman magistrates themselves staffed priestly colleges headed by the pontifex maximus, who kept the ritual calendar, marking which days permitted public business, and judged the correct performance of state rites to preserve the pax deorum.^[5–6]

Honouring the divi

Approved emperors and empresses were formally voted divine honours after death, becoming divi who received veneration and gratitude at dedicated cults and festivals, distinct from the Olympian dei who were addressed in prayer; this let Rome extend religious loyalty to its rulers without claiming any living emperor was, straightforwardly, a god.^[23]

People

Scripture

The Fasti

revised under Julius Caesar, 46 BCE

Rome's religious calendar, inherited in outline from its Etruscan kings and repeatedly revised, listed festivals and marked each day as fastus or nefastus — open or closed to public business — governing when state religious and civic life could proceed; the version revised under Julius Caesar underlies the Western calendar still used today.^{[6, 26]}

The Sibylline Books

A collection of Greek oracular verses kept under guard by a special priestly college, the Sibylline Books were consulted in moments of crisis and prescribed remedies such as new rites or the importing of a foreign god; the original collection was destroyed by fire in 82 BCE and replaced from other sources.^[14]

Places

Temple of Jupiter Optimus Maximus

ITA

Rome's most important early temple stood on the Capitoline Hill and housed the Capitoline Triad, Jupiter, Juno and Minerva, in a shrine whose plan and decoration, and whose original cult statue of Jupiter, Rome owed to Etruscan builders and sculptors.^{[4, 27]}

Art & objects

Public-domain objects from museum collections. Select one to see it at the museum.

Votive Arm and Hand of Zeus SabaziosItaly, Roman, 1–200 CELarItaly, Rome, Early Imperial period, 1–25 CEBronze statuette of Jupiter CapitolinusRoman, Imperial, 1st–2nd century CEBronze bust of MinervaRoman, Imperial, 1st–2nd century CEBronze statue of a camillus (acolyte)Roman, Early Imperial, Julio-Claudian, ca. 14–54 CEHand, right, votiveRoman, Imperial or later, 1st–3rd century CE laterMarble pillar with snake and wreathRoman, Imperial, 1st–2nd century CEMarble pediment of a funerary altarRoman, Hadrianic, ca. 120–130 CEBronze statuette of HarpokratesRoman, Imperial, 1st–2nd century CELead votive plaqueRoman, Imperial, probably 3rd century CEMarble round altar with a frieze of animals and masksRoman, Imperial, 1st century CEMarble funerary altar of Cominia TycheRoman, Flavian or Trajanic, ca. 90–100 CESilver votive plaqueRoman, Mid or Late Imperial, late 2nd–3rd century CEMarble cinerary urnRoman, Early Imperial, Julio-Claudian, 1st half of 1st century CE

Common misconceptions

Glossary

numen

The sacred power sensed in a specific object, place or act, addressed carefully by name; the oldest layer of Roman religious thought.^[8]

pax deorum

The 'peace of the gods': the benevolent relationship with the divine that correct Roman ritual was meant to secure and preserve.^[3]

pontifex maximus

Rome's chief priest, head of the College of Pontiffs, who kept the religious calendar and oversaw the state's relationship with the gods.^[5]

Capitoline Triad

Jupiter, Juno and Minerva, worshipped together in Rome's chief temple on the Capitoline Hill.^[4]

evocatio

A ritual inviting a conquered town's patron god to abandon it and take up new, honoured worship at Rome.^[22]

lectisternium

A Greek-derived rite in which images of paired gods were displayed on couches before food, as honoured guests, to calm a crisis.^[10]

divus

A deceased, Senate-approved emperor granted divine honours and veneration, as distinct from the Olympian dei addressed in prayer.^[23]

genius

The indwelling generative power of a family line, embodied in its male head and, by extension, honoured in the cult of the living emperor.^[17]

ius divinum

The body of rules governing what had to be done or avoided in Roman ritual, kept and interpreted by the College of Pontiffs.^[28]

augury

Reading the flight of birds and similar signs to judge whether the gods approved a proposed public action, performed by the College of Augurs.^[11]

haruspicy · Etrusca disciplina

Divination by examining the liver and entrails of sacrificed animals, an Etruscan practice that Roman diviners adopted and kept fashionable.^[12]

anthropomorphism

By the late 3rd century BCE, Rome's old functional numina had acquired human form and the attributes of their Greek divine counterparts.^[29]

Dioscuri

Castor and Pollux, Greek-origin twin gods among the earliest foreign cults absorbed into Roman worship alongside Ceres and Apollo.^[30]

supplicatio

A citywide procession of prostration before the temples to avert pestilence, a Greek-derived rite later extended to victory celebrations.^[31]

political religion

The view, held by educated Romans such as Cicero and Varro, that state religion's value lay chiefly in keeping the populace orderly and patriotic.^[32]

astral religion

Belief, encouraged by Stoic philosophy, that the heavens and earth share a cosmic sympathy that astrology could help humans read and even outwit.^[33]

Neoplatonism

Plotinus's mid-3rd-century CE philosophy of a single governing cosmic force, which became paganism's last systematic theology.^[34]

antiquarians

Scholars such as Varro, writing centuries after Rome's founding, whose accounts are the main literary source for early Roman religion, supplemented by calendars, inscriptions and archaeology.^[35]