The first theatre was erected on the former Torre Rodona, still called bastión Buit, which was part of the city's murals.
Several improvements were carried out throughout the 19th century. In 1845, the acquisition of neighbouring buildings enabled its extension. Its neoclassical facade dates from 1859, when the inside of the theatre was also restored. Its horseshoe-shaped room has a patio with a low slope surrounded by 16 arches supporting three floors as well as the gallery.
The Main Theatre offers a varied program and hosts famous theatre and opera performing shows. During the months of July and August the Music Festival of Estiu takes place, which counts among its guests world-class artists. In June and in December there is the opera week, very renowned in the lyrical sphere.