Nabila Erian La Traviata in Arabic on the stage of the Khedivial Opera House. She was also the Director of the Cairo Opera Company and the Associate Dean of the Cairo Conservatoire. In 2017, Erian delivered the introductory keynote speech at the La Traviata Met Live transmission at the American University in Cairo. Her repertoire includes most international composers for whom she sang in Italian, French, German and Russian. Those include among others: Puccini's Mme Butterfly, Tosca and La Bohème, Verdi's la Traviata, Aida and Rigoletto, Mozart's Marriage de Figaro, Bastien und Bastienne, and Don Giovanni, Bizet's Carmen, Handel's Oratorios, etc. Erian
Moses und Aron about the number 13; "Moses und Aaron" has 13 letters. Zoltán Kocsis (Hungarian conductor, composer and pianist) had received permission from Schoenberg's heirs in 2009 to complete the last act. His version was premiered in concert at Budapest on 16 January 2010. As Schoenberg always intended to finish the work, the opera was not performed during his lifetime. However, the first public performance of music from the opera was of "Der Tanz um das goldene Kalb" in concert at Darmstadt on 2 July 1951, just 11 days before the composer's death. There was a concert performance of the two acts