In German heroic legend, Alberich is a dwarf. He features most prominently in the poems Nibelungenlied and Ortnit. He also features in the Old Norse collection of German legends called the Thidreksaga
Alberich seduces the king's mother (a scene from Ortnit, 1480 woodcut)
Alberich (with whip) drives on the Nibelung dwarfs, who collect gold and other treasures. (Arthur Rackham, 1910)
Siegfried wrestles with Alberich (Julius Schnorr von Carolsfeld, 1843)
Das Rheingold, WWV 86A, is the first of the four epic music dramas that constitute Richard Wagner's cycle Der Ring des Nibelungen. It premiered as a single opera at the National Theatre of Munich on 2
Alberich's seizure of the Rhine gold, as depicted in scene 1 of the 1876 production
Wotan's fortress of Valhalla (Brückner, 1896)
Alberich and the subjugated Nibelung dwarfs (illustration by Arthur Rackham, 1910)
Libretto cover for Das Rheingold (Peter Hoffer)