Based on the three-layer model of narratives, proposed by Mieke Bal, the present transdisciplinary research describes narrative patterns as story layer constructs that help guiding how the story will be told. Narrative patterns are formed by sequences of episodes, which in turn are sequences of classes of events characteristic of the narratives of a chosen genre. Vogler s rendering of Campbell s monomyth is mentioned as a narrative pattern applicable to heroic quests, but it is argued that it does not match adequately Grail quest narratives, such as the unfinished romance of Chrétien de Troyes and its Continuations. A Grail quest pattern is then proposed, and its application to the special case of the Parzival romance of Wolfram von Eschenbach is discussed. As part of the discussion, it is claimed that the main source of Wolfram s divergent treatment of the final episodes of the Grail quest pattern is Ovid s classical Fasti poem. The research work resulting in this thesis is separately reported in an appendix