Two theatres in Walk I now provide the main indoor venues for the annual Festival dei Due Mondi.
Teatro Caio Melisso (1877-80)
The interior was redecorated in 1819 but the result was extremely unpopular, and provoked an attempt to burn the theatre down in 1853. It was seriously eclipsed when Teatro Nuovo (see below) opened in 1864.
The Commune subsequently built this new theatre on the site, which was named for Caius Melissus. He was a slave from Roman Spoletium who became a friend of Maecenas, and who became the librarian of the court of the Emperor Augustus after achieving his freedom.
Domenico Bruschi decorated the interior in ca. 1880. This work included:
✴the apotheosis of Caius Melissus, on the fire curtain; and
✴the fresco of Apollo and the muses, on the ceiling.
Teatro Nuovo (1854-64)
The interior decoration was commissioned from the Roman artist Giuseppe Masella. Francesco Coghetti painted the scene on the fire curtain in 1861: it depicts the defeat of Hannibal outside Spoleto.
This page in the website of Opere Pubbliche del Regione Umbria describes the recent restoration of the theatre.