The theatre's proximity to the sea in the 1st century meant that the stage backdrop originally overlooked the Adriatic waters before land reclamation changed the coastline.
Much of the original decorative statuary and architectural fragments found on-site are now housed in the nearby Lapidary Garden of the San Giusto Museum.
The site was mistakenly identified as a city wall for centuries because many medieval homes were built directly against and over the stone tiers.
The archaeological excavations in the early 20th century required the demolition of several residential buildings that had been structurally integrated into the ruins.
The theatre is oriented toward the south-southeast, ensuring that the audience faced away from the prevailing Bora wind during performances.
The Roman Theatre of Trieste is an ancient architectural landmark built at the foot of San Giusto Hill, dating back to the 1st century AD. It was constructed under the reign of Emperor Trajan and expanded during the 2nd century. The structure was rediscovered in 1814 when historians began investigating the foundation walls of houses built over its ruins. Unlike many other Roman theaters, this site was built partially into the slope of the hill to provide structural support for the seating tiers. It could originally accommodate approximately 3,500 to 6,000 spectators. The site remains integrated into the modern city layout, with contemporary residential buildings surrounding the perimeter. Significant portions of the stage area and stone seating rows are still visible to the public. It serves as a rare example of a Roman provincial theatre that transitioned into the medieval urban fabric of Trieste.
The elevated sidewalk on Via del Teatro Romano provides a panoramic view of the entire semi-circular structure.
The ruins are visible from the street level at all times, making a dedicated walking tour optional.
Visit during the early morning to avoid the glare of the sun on the white limestone.
The site is best viewed from the upper street level walkway for a complete overview of the layout.
Do not attempt to climb the ancient stone seating tiers, as they are fragile and strictly preserved.
