Camerata Rousseau performs eighteenth century repertoire on historical instruments under the leadership of its initiator, Leonardo Muzii. Its name refers to Jean-Jacques Rousseau, the Geneva philosopher-musicologist composer of the Age of Enlightenment. Many of the musicians have come to the Schola Cantorum Basiliensis to complete their training in Historically Informed Performance Practice. As a result, the Camerata Rousseau has an international background in which different languages, cultures coexist and complement each other. The repertoire - not only Mozart! The repertoire of Viennese classical music, which is usually performed in concerts, consists of a relatively small number of works, most of which originate from the Mozart-Haydn-Beethoven-Triad. The public's attention is therefore focused on these works, the performers are trained in this repertoire, and it has been a priority on the music stages for generations. In contrast, the Camerata Rousseau is not only aimed at Mozart, but also at lesser known authors. For example, our project "Mozart versus Kozeluch" has enabled us to deepen our knowledge of the Bohemian composer Leopold Kozeluch and to measure ourselves against some of his works that are still free of the crystallization of interpretative traditions. This pioneering work brings to light previously unknown works - sometimes masterpieces - and, by juxtaposing them with the consolidated repertoire, opens up new perspectives for judgment and reflection.