It was built on the project of the Venetian brothers Giovan Battista and Tomaso Meduna. Structured on two floors on the front, it is preceded by a Ionic tetrastile portico. The theater hall, made like a horseshoe and slightly sloping, originally it had four tiers with 25 theater boxes plus the gallery. The internal decorations are the work of the Venetian artists: Giuseppe Voltan, Giuseppe Lorenzo Gatteri, Carlo Franco.