(57 books) of music and 10 volumes (13 books) of relevant documents and texts. As at October 2017, three volumes remain to be published. The publisher is Schott Music. Operas Wagner's operatic works are his primary artistic legacy. Unlike most opera composers, who generally left the task of writing the libretto (the text and lyrics) to others, Wagner wrote his own libretti, which he referred to as "poems". From 1849 onwards, he urged a new concept of opera often referred to as "music drama" (although he later rejected this term), in which all musical, poetic and dramatic elements were to be fused together—the Gesamtkunstwerk. Wagner developed a compositional style in which the importance of the orchestra is equal to that of the singers. The orchestra's dramatic role in the later operas includes the use of leitmotifs, musical phrases that can be interpreted as announcing specific characters, locales, and plot elements; their complex interweaving and evolution illuminates the progression of the drama. These operas are still, despite Wagner's reservations, referred to by many writers as "music dramas". Early works (to 1842) Wagner's earliest attempts at opera were often uncompleted. Abandoned works include a pastoral opera based on Goethe's Die Laune des Verliebten (The Infatuated Lover's Caprice), written at the age of 17, Die Hochzeit (The Wedding), on which Wagner worked in 1832, and the singspiel Männerlist größer als Frauenlist (Men are More Cunning than Women, 1837–1838). Die Feen (The Fairies, 1833) was not performed in the composer's lifetime and Das Liebesverbot (The Ban on Love, 1836) was withdrawn after its first performance. Rienzi (1842) was Wagner's first opera to be successfully staged. The compositional style of these early works was conventional—the relatively more sophisticated Rienzi showing the clear influence of Grand Opera à la Spontini and Meyerbeer—and did not exhibit the innovations that would mark Wagner's place in musical history. Later in life, Wagner said that he did not consider these works to be part of his oeuvre; and they have been performed only rarely in the last hundred years, although the overture to Rienzi is an occasional concert-hall piece. Die Feen, Das Liebesverbot, and Rienzi were performed at both Leipzig and Bayreuth in 2013 to mark the composer's bicentenary. "Romantic operas" (1843–1851) Wagner's middle stage output began with Der fliegende Holländer (The Flying Dutchman, 1843), followed by Tannhäuser (1845) and Lohengrin (1850). These three operas are sometimes referred to as