Theatre of Marcellus

The Theatre of Marcellus is an ancient Roman open-air theatre in Rome’s historic centre, begun under Julius Caesar and completed under Augustus in the late first century BC. It was one of the city’s largest theatres in antiquity and its remaining arcades are a visible element of the Roman urban fabric.

The surviving semicircular cavea and the outer arcades are the primary visible remains, and later medieval and Renaissance buildings were inserted into the structure, so the site shows continuity of use. The theatre once accommodated an audience estimated between 15,000 and 20,000 and formed a major entertainment venue in ancient Rome.

The integration of ancient stonework with later palazzi creates a distinctive streetscape that is readily accessible from nearby visitor routes and plazas. Interpretive information and surrounding archaeological remains make the site a standard stop on walks through the historic centre.

Originally constructed for theatrical performances and public spectacles, the building was begun in the late Republic and completed under Augustus. In the Middle Ages the structure was quarried and reworked into fortified and residential buildings, a pattern that preserved substantial portions of the arcades and lower walls.

Set on the edge of Rome’s ancient core near the Tiber and the Capitoline Hill, the theatre lies close to the Jewish Ghetto and the historic riverfront area, within easy walking distance of other major archaeological sites.

• Date and capacity: Construction was begun under Julius Caesar and completed under Augustus in the late first century BC, with an estimated seating capacity of 15,000 to 20,000.
• Location tip: Located close to the Tiber and the Capitoline Hill, the theatre sits adjacent to Rome's Jewish Ghetto and the ancient city centre.

What to See #

• Arcades and cavea: The semicircular cavea and surviving outer arcades form the main visible remains of the ancient theatre and remain integrated into later buildings.
• Palazzo adaptations: Medieval and Renaissance palazzo structures were built into and above the theatre ruins, converting parts into residential and commercial buildings in later centuries.