"니벨룽의 노래" (Nibelungenlied) is a medieval German epic poem that tells the story of the hero Siegfried, his marriage to Kriemhild, and the tragic events that follow. The narrative explores themes of love, betrayal, and revenge, set against a backdrop of mythical and historical elements. The poem is divided into two main parts: the first focuses on Siegfried's adventures and his death, while the second centers on Kriemhild's quest for vengeance. It is considered a foundational work of German literature and has influenced various adaptations in literature, music, and film, including Richard Wagner's famous opera cycle, Der Ring des Nibelungen.