Theater Basel is the municipal theatre of the city of Basel, Switzerland, which is home to the city's opera and ballet companies. The theatre also presents plays and musicals in addition to operas and operettas. Because the theatre does not have its own orchestra, the Symphony Orchestra Basel is usually contracted to perform for opera and ballet productions as needed. For baroque-opera productions, La Cetra, the baroque orchestra of the Schola Cantorum Basiliensis, is engaged.