Dating back to the 1st century BC, the structure was profoundly altered during the Augustan age with the construction of a masonry proscenium decorated with paintings. In the 1960s, excavation operations brought to light the remaining part of the cavea, with the seats of the prohedria (the first row destined for the authorities) made of tufa blocks, closed on both sides by decorative sculptures representing a sphinx and a winged lion.
