The »Nürnberger Marienbuch« dates from around 1410 and contains the earliest German prose account of the life of the Virgin Mary, a collection of miracles associated with her, and two interpretations. Accounts of the life of Mary and the miracles associated with her were the main sources for the Marian legends contained in the widely disseminated German book of saints' lives »Der Heiligen Leben«. The present volume presents an edition of the »Marienbuch« complete with an apparatus on the sources, studies on origins and dating, the state of research on the sources, and the reuse of the text as a source for »Der Heiligen Leben« and »Der Magnet unserer lieben Frau«.