The Roman Theatre of Mérida belonged to Augusta Emerita, a colony founded in 25 BCE for veterans of Rome's Cantabrian Wars. Its position on the Guadiana and roads of western Iberia helped the city become capital of the province of Lusitania. An inscription associates the theater's construction in 16–15 BCE with Marcus Vipsanius Agrippa, Augustus's son-in-law and political partner. Builders set part of the semicircular cavea into a hillside and completed the rest with concrete and ashlar, creating seating for roughly six thousand spectators arranged according to social rank.

Drama, music, ceremony, and public display joined entertainment with imperial and civic order. The orchestra, stage, entrances, porticoed garden, and richly ornamented scaenae frons organized spectators and performers while statues of rulers and gods linked the venue to Roman authority. Later renovations added marble, sculpture, and a sacred imperial-cult space. The adjacent amphitheater served different spectacles, and the theater formed one component of a city containing bridges, aqueducts, temples, baths, houses, workshops, and a circus. Christianization and changing urban life eventually ended regular classical performances.

After antiquity, collapse, sediment, cultivation, and reuse buried much of the structure. Only portions of the upper seating remained conspicuous, popularly called the Seven Chairs. Systematic excavation began in 1910 under José Ramón Mélida and Maximiliano Macías. Archaeologists exposed the cavea, orchestra, stage, statues, portico, and nearby domestic remains. The decision to revive performances led to Mérida's Classical Theatre Festival from 1933 onward, making the monument an active venue again. Archaeological research and theatrical use have since shaped public understanding as strongly as the original Roman program.

The seating, foundations, walls, marble paving, and numerous architectural fragments preserve substantial Roman fabric, but the commanding stage façade is not entirely standing ancient architecture. Twentieth-century anastylosis re-erected columns, capitals, entablatures, statues, and wall elements from surviving pieces, supplemented where necessary to recover the composition. Seats and circulation routes have been repaired for modern audiences, while lighting, stages, barriers, services, and safety systems are contemporary. The result is a carefully restored archaeological theater capable of performance, not an untouched building continuously operating since Augustus.

The theater forms part of the UNESCO-listed Archaeological Ensemble of Mérida and is managed through regional and municipal heritage institutions. Archaeological admission and festival performances follow different tickets and access arrangements. Preservation must reconcile large audiences with fragile stone, weather, drainage, research, and the need to distinguish temporary scenery from the monument. Interpretation should explain Roman social segregation, provincial power, later abandonment, excavation, and modern cultural revival. The site's authenticity lies in its surviving material and intelligible restoration, strengthened when reconstructed portions of the scaenae frons are described openly.