Haydn and Mozart symphony and a chorus, both probably from [the oratorio] "Il ritorno di Tobia"") and Mozart ("a new concert aria, probably 'Misero! o sogno!' [K. 431], and, on the first night, a piano concerto") At the time of this meeting, Haydn was the most celebrated composer in Europe. Mozart's own reputation was definitely on the rise. His opera "The Abduction from the Seraglio" had been premiered with great success in Vienna, and was being produced in several other cities. Haydn would have been about 52 at the time, Mozart about 28. Jens Peter Larsen suggests that "quartet playing was central to
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