The legend of M lusine examined in a pan-European context. Readers have long been fascinated by the enigmatic figure of M lusine - a beautiful fairy woman cursed to transform into a half-serpent once a week, whose part-monstrous sons are the ancestor of several European noble houses. This study is the first to consider how this romance developed from a local legend to European bestseller, analysing versions in French, German, Castilian, Dutch,...