Mars and the Vestal Virgin Rhea Silvia

At a Glance

• Central figures: Rhea Silvia, a Vestal Virgin and daughter of the deposed king Numitor of Alba Longa; Mars, god of war and father of her twin sons; Amulius, Numitor’s brother and usurper of the throne.
• Setting: Alba Longa in Latium, roughly four centuries after Aeneas founded Lavinium, as recorded by Livy in Ab Urbe Condita and referenced in Plutarch’s Life of Romulus and Ovid’s Fasti.
• The turn: Amulius forces Rhea Silvia into the order of Vestal Virgins to prevent her from bearing heirs, but Mars comes to her, and she conceives twins.
• The outcome: Amulius imprisons Rhea Silvia and orders her newborn sons cast into the flooding Tiber; the river carries the infants to the foot of the Palatine Hill, where a she-wolf nurses them and a shepherd named Faustulus takes them in.
• The legacy: The twins Romulus and Remus survive to found Rome, and the she-wolf - the lupa - becomes the enduring symbol of the city itself.

Amulius wanted no rivals. He had already taken the throne of Alba Longa from his elder brother Numitor by force - not through open war but through the quieter mechanics of court politics, the kind of seizure that leaves the victim alive but stripped of everything that matters. Numitor lived on in Alba Longa, an old man without power, without sons. Amulius had seen to that. Numitor’s male heir was dead, killed on a hunt that was no accident.

That left the daughter. Rhea Silvia was young, of royal blood, and capable of bearing sons who might one day remember whose throne it really was. Amulius needed her barren, but he needed it done correctly - through religion, not murder. Murder of a king’s granddaughter would invite questions. A consecration would invite none.

The Veil of Vesta

He appointed her a Vestal Virgin. The six Vestals who tended the sacred flame of Vesta in the temple at Alba Longa were bound by oath to thirty years of chastity. A Vestal who broke her vow was buried alive in the Campus Sceleratus, the Field of Wickedness, sealed into a small underground chamber with a lamp, a loaf of bread, and a jug of water - provisions meant not as mercy but as theological cover, so the state could say it had not technically killed a consecrated woman. She simply died underground.

Amulius counted on this. The oath would cage Rhea Silvia as no prison could, because the cage was divine. She would grow old tending the flame. She would bear no children. The line of Numitor would end with her.

For a time, this held. Rhea Silvia performed her duties. She carried water from the spring, she fed the fire, she wore the white suffibulum - the linen veil pinned with a brooch - that marked her status. She was watched. All Vestals were watched, by the Pontifex Maximus, by other priests, by the city itself, because the purity of the Vestals was understood to be the purity of the state. If Vesta’s flame went out or a Virgin broke her vow, it meant the compact between Alba Longa and its gods had cracked. Plague, famine, military defeat - any disaster could follow.

The God in the Grove

What followed instead was Mars.

The sources disagree on the details. Livy says Rhea Silvia was violated - vi compressa, forced - and that she named Mars as her assailant either because it was true or because a god made a more respectable father than an unknown man. Ovid, writing in the Fasti, gives the encounter a different texture: Rhea Silvia had gone to a sacred grove to draw water for the rites when sleep overcame her, and Mars found her there among the trees. Plutarch records still another version in which the god’s shade appeared to her in the house of Vesta itself, filling the room with fire and darkness.

What none of the sources dispute is the result. Rhea Silvia conceived. The pregnancy could not be hidden for long - not from the other Vestals, not from the Pontifex, and certainly not from Amulius, whose entire strategy depended on her remaining childless.

She bore twins. Two boys.

Amulius and the Tiber

Amulius acted quickly. Rhea Silvia was stripped of her veil and taken into custody. Some traditions say she was imprisoned, chained in a dark cell beneath the palace. Others say she was thrown into the Tiber itself and drowned - though a variant preserved by the annalists holds that the river god Tiberinus pitied her, caught her body in his current, and took her as his wife beneath the water. In this version she did not die but lived on in the river, a presence felt in the silt and the flood.

The infants Amulius ordered destroyed. His servants were told to drown them in the Tiber, which was in flood that season - the spring melt from the Apennines had swollen it past its banks, turning the lowlands along the Palatine and the Aventine into shallow marsh. The servants carried the twins in a trough or basket to the river’s edge, set them in the water, and left. They did not wade out into the deeper current. They left the killing to the river.

The Tiber did not cooperate. The floodwaters carried the trough downstream, gently, bumping it through reeds and mud, until it lodged at the base of the Palatine Hill near a fig tree - the Ficus Ruminalis, which Romans in later centuries still pointed to as a landmark. There a she-wolf found the crying infants and nursed them. A woodpecker - the bird sacred to Mars, the picus - brought them food. These were not accidents. The wolf and the bird were agents of their father. Mars had not forgotten his sons.

Faustulus at the Fig Tree

The shepherd Faustulus found them there. He was one of Amulius’s own herdsmen, tending the royal flocks on the Palatine’s lower slopes, and he came upon the she-wolf crouched at the foot of the fig tree with two human infants suckling alongside her cubs. He did not kill the wolf or run. He waited until she left, then gathered the boys and brought them home to his wife, Acca Larentia.

Faustulus and Acca Larentia raised the twins as their own. They named them Romulus and Remus. The boys grew up among shepherds, rough and strong, leaders before they knew their blood. They settled disputes, organized raids against cattle thieves, gathered other young men around them. They did not know they were grandsons of a king.

That knowledge came later - through Faustulus, who had kept the secret for years, or through an encounter with Numitor that revealed the resemblance. When the truth surfaced, Romulus and Remus killed Amulius, restored Numitor to the throne of Alba Longa, and set out to found a city of their own at the place where the river had deposited them: the Palatine Hill, beside the Tiber that had refused to drown them.

The Wolf on the Capitoline

Rome remembered its origins. The bronze she-wolf stood on the Capitoline for centuries - ears forward, ribs visible, teats heavy with milk. Every Roman who passed it understood what it meant: that the city’s founders had been condemned to die, that a god had intervened through an animal, that the state itself was born from an act of divine violation and royal crime. Rhea Silvia’s name appeared in the calendars and the genealogies, fixed in place as the mortal woman through whom Mars entered the bloodline of Rome. Her imprisonment, her suffering, her possible death in the river - none of it was softened in the telling. The Romans did not soften founding stories. They recorded them, and they built temples over the ground where the events had taken place, and they sacrificed to the gods who had made the city possible, including the war god who had come to a sleeping woman in a grove and fathered the twins who would draw Rome’s first boundary in the dirt of the Palatine.