The Teatro Principal in Castellón de la Plana opened in 1894, during a period when many Spanish cities were modernising their cultural infrastructure. It replaced an older theatre building that no longer met the growing urban ambitions and the need for a representative cultural meeting place. Since its inauguration, the theatre has formed a central part of cultural life in the province of Castellón, in the Valencia region.

The building was designed in an eclectic style with neoclassical influences, typical of Spanish theatres from the late 19th century. The façade follows a classical composition, with symmetrical lines and traditional ornamentation. Inside, the auditorium follows the traditional Italian theatre model with a horseshoe-shaped layout, designed to optimise sightlines and acoustics. Two balcony tiers surround the stalls, finished with elegant wrought-iron balustrades. The ceiling is richly decorated and centrally dominated by a large chandelier. The proscenium arch framing the stage features decorative paintings and ornamental details that emphasise the theatre’s original grandeur.

In the first decades after its opening, the theatre hosted stage plays, opera, zarzuela and musical performances. During the 20th century, film screenings were added, as happened in many historic theatres across Spain. This allowed the building to remain multifunctional and economically relevant in changing times.

Throughout the 20th century, the Teatro Principal underwent several renovations and technical upgrades. These interventions were necessary to comply with modern safety standards, comfort requirements and the technical demands of contemporary stage productions. Later restoration works placed strong emphasis on preserving the historic interior details and maintaining the original architectural character.