Roman Theatre of Cartagena
Historic siteA theatre built for 7,000 people vanished so completely that nobody knew it existed — not from ruins, not from historical texts, nothing. It took a construction crew stumbling onto it by accident in 1988 to reveal one of the largest Roman theatres ever found in Spain, buried under two thousand years of the city built directly on top of it.
Buried under a market, then a cathedral
The theatre was built between 5 and 1 BC, dedicated to Augustus’s own grandsons Gaius and Lucius Caesar, in what was then Carthago Nova — a genuinely major Roman city, reflected in a theatre 87 metres across with stands rising 14 metres, cut into the natural hillside. Its concealment happened in layers, one century at a time. By the 3rd century AD, a market had already been built directly over part of the stage. The Vandals sacked the city in 425, and when Byzantine forces under Emperor Justinian retook it in the 6th century, they built an entirely new commercial quarter on the same spot, burying the theatre further. The final layer came in the 13th century, when the Cathedral of Santa María la Vieja was constructed directly on top of the upper seating, its walls incorporating stone salvaged from the ancient structure beneath it.
Found by accident, not by search
Excavation began in October 1988 for what was meant to be a straightforward project: converting the Casa-Palacio de la Condesa Peralta into a regional crafts centre. What the archaeologists actually found beneath the foundations changed the scope of the project entirely, and by 1990 the scale of the discovery was clear. Led by Sebastián Ramallo Asensio of the University of Murcia, the excavation revealed that roughly 60% of the theatre’s original materials had survived in situ — an exceptional preservation rate for a structure that had been continuously built over for close to two thousand years. The site was declared a Cultural Interest Site in 1999, and the museum built to house it, designed by celebrated architect Rafael Moneo, won the European Union Prize for Cultural Heritage in 2010.
A journey through the crypt
Visitors descend through the old cathedral’s own crypt to reach the theatre, a deliberate architectural device that walks people physically through the layers of history that once hid it.
Seating for 7,000
The theatre’s 87-metre diameter and 14-metre-high stands made it one of the largest public buildings in Roman Hispania.
60% original material
An unusually high proportion of the structure’s stone survives in its original position, rather than reconstructed or replaced.
EU Prize for Cultural Heritage, 2010
Architect Rafael Moneo’s museum design, connecting two buildings via an underground corridor, was internationally recognised for its handling of the site.
Frequently asked questions
How was the theatre discovered?
By accident, in 1988, during construction work intended to convert a historic building into a regional crafts centre — its existence wasn’t previously documented.
What was built over the theatre before it was found?
A Roman-era market, a later Byzantine commercial district, and finally the 13th-century Cathedral of Santa María la Vieja, built directly on the upper seating.
How much of the original structure survives?
Around 60% of the theatre’s original materials remain in their original positions, an unusually high preservation rate.
How do visitors reach the theatre today?
Through a museum designed by architect Rafael Moneo, entering via the crypt of the old cathedral before descending to the ancient structure beneath.
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How this page is maintained. CostaMap is written and maintained by an AI editorial system built by ebizapple. Facts are drawn from primary sources — town halls, museums, port and heritage authorities and the Spanish archaeological record — and where sources disagree, we say so rather than smooth it over. Photographs marked as ours are taken on location. This page was last reviewed on 10 August 2026. Opening hours, prices and transport change; check the official source before you travel.