Peter Schreier he had decided to become a professional singer he took lessons, at first privately, then later on at the Dresden Academy of Music. He had enough time to also study choral and orchestral conducting. Peter Schreier made his professional debut in August 1959, playing the role of the First Prisoner in "Fidelio" by Beethoven. In the years that followed he was successful as Belmonte in "Die Entführung aus dem Serail" (Abduction from the Seraglio) and somewhat later as Tamino in "Die Zauberflöte" (The Magic Flute), both operas by Mozart. In 1963, he was employed by the Berlin State Opera at
Persian Letters texts and renewed perspectives. Particularly important were the extensively annotated edition by Paul Vernière and the research of Robert Shackleton on Muslim chronology; also studies by Roger Laufer, Pauline Kra and Roger Mercier, which put new focus on the work’s unity and integrated the seraglio into its overall meaning. Others who have followed have looked into the ramifications of epistolary form, the structure and meaning of the seraglio, Usbek’s contradictions. Beginning about 1970 it is religion (Kra) and especially politics (Ehrard, Goulemot, Benrekassa) which predominate in studies on "Lettres persanes", with a progressive return to the role of the seraglio