Literaturoper
Literaturoper (German: [lɪtəʁaˈtuːɐ̯ˌʔoːpɐ] ; "literature opera"; plural Literaturopern), a term coined by the German music critic Edgar Istel, describes a genre of opera that emerged during the late 19th century. When an existing play for the legitimate theatre is set to music without major changes and without the intervention of a librettist, a Literaturoper is the result.