Opera in Concert, founded in Toronto in 1974, has presented over 129 operas, covering a stylistic gamut of rarely performed operatic repertoire ranging from Handel's Ariodante to Verdi's I Vespri Siciliani. Opera in Concert's 20th anniversary performance of Ambroise Thomas' Hamlet was broadcast by the Canadian Broadcasting Corporation and by Radio Canada followed by a second CBC radio broadcast of another Thomas opera, Mignon with Isabel Bayrakdarian and the Kitchener-Waterloo Symphony conducted by Robert Cooper. In 1994 Guillermo Silva-Marin was appointed General Director of Opera in Concert with a renewed mandate to present operas seldom, if ever performed in Canada. Marschner's Der Vampyr, Verdi's Luisa Miller, Bellini's La Sonnambula, Arrieta's Marina, and Rimsky-Korsakov's Sadko joined the company's first Canadian works including Timothy Sullivan's Florence, The Lady With The Lamp, Healey Willan's Deirdre and John Beckwith's The Shivaree as examples of the adventurous repertoire opera lovers can expect from Opera in Concert in the new millennium. Opera in Concert has collaborated with Aradia Ensemble performing Handel's Semele, Rameau's Castor et Pollux and Handel's Rinaldo.