Bayreuth Festspielhaus
Tietjen was the director of the Deutsche Oper Berlin between 1925 and 1927, then director of the Prussian State Theatre. Amongst his productions at this time was the Berlin premiere of Hans Gál's 1923 opera, "Die heilige Ente". From 1931 to 1944, Tietjen served as artistic director at the Bayreuth Festspielhaus for Winifred Wagner with whom he had a romantic liaison.