This volume explores a core medieval myth, the tale of an Arthurian knight called Wigalois, and the ways it connects the Yiddish-speaking Jews and the German-speaking non-Jews of the Holy Roman Empire. The German Wigalois / Viduvilt adaptations grow from a multistage process: a German text adapted into Yiddish adapted into German, creating adaptations actively shaped by a minority culture within a majority culture. The Knight without Boundaries examines five key moments in the Wigalois / Viduvilt tradition that highlight transitions between narratological and meta-narratological patterns and audiences of different religious-cultural or lingual background.