Fin de siècle literature refers to the body of work produced during the late 19th century, particularly in Europe, characterized by themes of decadence, existentialism, and a sense of impending change. This literary movement reflects the anxieties and transformations of the time, such as urbanization, industrialization, and the questioning of traditional values and norms. Authors often expressed a sense of disillusionment and explored darker aspects of human experience, paving the way for modernist literature that emerged in the early 20th century.