Built between the years 5 and 1 BCE, it had a capacity of some 6,000 spectators and was used for Roman theatrical performances during ancient Rome.

The theatre was built between 5 and 1 BCE, as has been proven by the dedication of the edifice to Gaius and Lucius Caesar, grandsons of Augustus, who had designated them as his successors.

In the 3rd century a market was built over the theatre, reusing its materials, with a semicircular open space which followed the plan of the orchestra.

The cavea was carved directly on the rocks in its central part, and tops a series of vaulted galleries.

The stage (proscenium) had a length of 43.60 m. The scaenae frons had three semicircular exedras and decorated by two orders of columns, with bases and capitals in Luni's marble, and shaft in pink travertine of Mula.