The Via Portuensis is the route Vinicius takes toward the Trans-Tiber district during the Great Fire of Rome, when he believes Lygia may be in danger there. Its importance is practical and dramatic: blocked crossings make it one of the few possible approaches, but the road carries him into a city where the paths of escape, rescue, and violence have become inseparable. It also belongs to the wider geography of the disaster, linking the stricken city with the movement of people and supplies beyond it.

Route Through a Burning City

When Vinicius reaches the outskirts of Rome, he learns that the Trans-Tiber district matters more to him than any other part of the city. At first, however, the route is uncertain: the fire’s spread across the river is unclear, and the Via Portuensis is described as accessible near the Aventine only at the cost of crossing a zone of extreme heat. Reports that people are throwing torches into buildings and preventing others from putting out the flames deepen the sense that ordinary directions no longer guarantee a safe passage. Vinicius presses on toward Rome, determined to reach Lygia.

The road network itself turns against him. He cannot get through the Appian Gate because of the press of people and the heat within it. Nor can he cross by the bridge near the Porta Trigena: it has not yet been built, so anyone heading beyond the Tiber must reach the Pons Sublicius by going around the Aventine through an area already covered by fire. Vinicius therefore has to reverse course, travel back toward Ustrinum, cross the river below the city, and make for the Via Portuensis. His route is shaped not by a direct approach but by the fire’s geography and the failure of the available crossings.

Flight, Disorder, and Passage

The approach to the Via Portuensis runs through a larger collapse of civic order. Near the Appian Gate, fugitives stream out alongside carts and salvaged belongings; the road is obstructed by possessions, and crowds accuse Nero of setting Rome alight. Vinicius forces a passage with a detachment of soldiers, exposing the conflict between his personal urgency and the danger to those in his way. He reaches the village of Vicus Alexandri, crosses the Tiber there, and learns from refugees that parts of the Trans-Tiber district are burning and that, according to their reports, the fire is being deliberately spread. The reports persuade him that Nero ordered the destruction, but this is Vinicius’s conclusion amid the crisis, not a fact established by the road itself.

From the Via Portuensis he turns toward the district’s interior. The Trans-Tiber is crowded with thousands fleeing their homes, while others move in the opposite direction through narrow passages. Near the Naumachia Augusta, piles of rescued goods choke the way; in alleys, smoke gathers so thickly that passage becomes impossible. Columns of smoke repeatedly hide houses and people before the wind drives them off, and the heat of the July day makes breathing difficult. In this setting the road is less a clear avenue than a fragile line through a mass of people and obstructions.

The Search for Lygia

Vinicius eventually reaches the alley containing the house of Linus. The household is gone. He identifies Lygia’s sleeping room by her clothes hanging on the wall and a close-fitting garment left on the bed; he takes the garment, presses it to his lips, and carries it with him as he searches the rest of the small house, including its cellar. Finding no one, he supposes that Lygia, Linus, Ursus, and the other inhabitants have fled. He is relieved to think they may have escaped the flames, perhaps by way of the opposite side of the Trans-Tiber and the Vatican Hill.

That brief relief cannot last. As the fire draws nearer from the direction of the island and smoke fills the alley, the light inside the house goes out. Vinicius runs back toward the Via Portuensis through smoke and falling sparks; his tunic begins to smoulder, and he wraps Lygia’s garment across his mouth. The route that brought him toward her now becomes his way out of a street turning into a trap. His physical escape is bound to the search: he keeps moving because he believes Lygia is waiting beyond the city, and his feverish conviction that he must see her and marry her becomes a measure of how completely the catastrophe has narrowed his world to her safety.

Beyond the Immediate Search

The Via Portuensis belongs to the wider movement between Rome and the settlements and communities around it. During the crisis, people flee through the city gates while residents of nearby towns and the Campania move toward the burning city, some drawn by the prospect of plunder. With stores destroyed and hunger spreading among the displaced, the authorities order provisions from Ostia and other towns and villages. The narrative also places the route within the city’s changing supply geography: after the immediate danger, ships, boats, and barges crowd the Tiber as provisions arrive, while wheat is sold cheaply and given to the indigent.

Thus the road’s significance is not that it provides a secure escape, but that it reveals the cost of movement through a city whose infrastructure has failed under fire, smoke, and mass displacement. For Vinicius, it is the route to Lygia and then a desperate way back out; for the larger disaster, it forms part of the strained connection between the burning capital and the places from which refugees and relief supplies move. The search and the relief effort share the same geography, but neither can restore the safety that the fire has destroyed.