Porta San Sebastiano

Porta San Sebastiano is a well-preserved gate in Rome’s Aurelian Walls, located where the ancient Via Appia enters the city. It retains substantial original fabric and provides a clear example of Roman military architecture incorporated into the modern urban fabric.

The gate complex houses the Museo delle Mura, which occupies interior rooms and offers displays on the walls’ construction and function, plus viewpoints along the ramparts. The presence of an interpretive museum inside the gate makes it unusual among Rome’s city gates.

The gate dates to the late 3rd century AD as part of the Aurelian defensive circuit and has survived multiple restorations and reuses across the medieval and modern periods. Its form today reflects both the original Roman construction and later interventions for preservation and interpretation.

Porta San Sebastiano sits at the entrance to the Via Appia Antica on Rome’s southeastern side, within the city’s ancient walls and adjacent to stretches of the preserved Appian Way and associated archaeological sites.

• Preservation and viewing: One of the best-preserved gates of the Aurelian Walls, offering a rare interior museum space with viewpoints over the ancient fortifications.

What to See #

• Museo delle Mura: A museum installed within the gate complex that explains the history and construction of the Aurelian Walls, displays archaeological finds and offers a covered vantage point over the Appian Way and neighbouring sections of the wall.