The construction of the Aosta Theater is believed to have occurred a few decades after the foundation of the city, in 25 BC.: in fact, in the area, remains of pre-existing buildings have been found. The amphitheater dates back to the era ofemperor Claudio.
Together with the amphitheater, located on the same axis, it occupies three blocks adjacent to the city walls, along the main street of the city, the Decumano maximum, near the Porta Prætoria.
The theater occupied an area of 81 m in width and 64 m in length. The cavea it was inserted into a rectangular enclosure, whose external façade is preserved for a height of 22 m on the southern side; its facade it was distinguished by a series of vertical buttresses placed at 5,5 m away from each other and lightened by four orders of openings: at the bottom, the entrance arches and, upwards, three orders of overlapping windows, different form. This insertion made us suppose the existence of a cover, which was to make the building a theatrum tectum, on the type of that of Pompeii.
The steps of the auditorium could accommodate 3.500 / 4.000 spectators, the theater orchestra had a radius of 10 m. The wall of the scene, of which only the foundations remain, was decorated with Corinthian columns and statues and covered with marble.
The theater is not perfectly semi-circular but has a somewhat rectangular shape; it is high 22 me it is perfectly preserved.
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