"니벨룽겐" refers to the epic poem "Nibelungenlied," a key work of German literature from the Middle Ages. It tells the story of Siegfried, a hero who slays a dragon and wins a treasure, including a cursed gold hoard belonging to the Nibelungs. The narrative explores themes of love, betrayal, and revenge, culminating in tragic events. The poem is divided into two main parts: the first focuses on Siegfried's adventures and marriage to Kriemhild, while the second deals with the consequences of betrayal and the ensuing conflict. The "Nibelungenlied" has influenced various adaptations in literature, music, and film, highlighting its enduring legacy.