The Roman colony of Emerita Augusta (present day Mérida) was founded in 25 BC by Augustus, to resettle emeritus soldiers discharged from the Roman army from two veteran legions of the Cantabrian Wars: Legio V Alaudae and Legio X Gemina. The city was the capital of the Roman province of Lusitania.
Today the Archaeological Ensemble of Mérida is one of the largest and most extensive archaeological sites in Spain and a UNESCO World Heritage Site since 1993.
The theatre was built from 16 to 15 BC and dedicated by the consul Marcus Vipsanius Agrippa. It was renovated in the late 1st or early 2nd century AD, possibly by the emperor Trajan, and again between 330 and 340 during Constantine's reign, when a walkway around the monument and new decorative elements were added. With the advent of Christianity as Rome's sole state religion, theatrical performances were officially declared immoral: the theatre was abandoned and most of its fabric was covered with earth, leaving only its upper tiers of seats (summa cavea). In Spanish tradition, these were known as "The Seven Chairs" in which it is popularly thought that several Moorish kings held court to decide the fate of the city.