Song of the Nibelungen
"Toward the end of the twelfth century and the beginning of the thirteenth century, in an age where the literature of the German High Middle Ages blossomed, there appeared an epic, which is considered to be the most famous and best-known literary achievement of that era: 'The Nibelungenlied' ('Song of the Nibelungen').
If you're reading "The Nibelungenlied" in German, this site offers dictionaries, books, grammar tips, and more.
The Nibelungen: the historical truth
This site offers a great deal of information related to "The NIbelungen," including the basic story, research, the traditional theory, history, bibliography, and more.
The Nibelungenlied (The Song of the Nibelungs)
The Nibelungenlied (or The Song of the Nibelungs) came at a pivotal shift in poetic modes, when the brutal histories that it recounts needed to be tempered to an age of courtly chivalry.