Ruhr triennale - Germany : Medieninhaber, 2003 - 55 p.: Δίγλ. Γερμανική / Αγγλική The Ruhrtriennale is an annual music and arts festival in the northwestern area of Germany which runs between mid-August and mid-October. Ruhr triennale, Saison 2033. 30 April-12 Oktober. [intendant] Mortier Gerard Subjects--Corporate Names: Ruhr triennale (2003) Dewey Class. No.: 709.4