Der Mythus des 20. Jahrhunderts
The publication of the early scholarly book "Crusade Against the Grail", by the young German Otto Rahn in the 1930s, rekindled interest in the connection between the Cathars and the Holy Grail, especially in Germany. Rahn was convinced that the 13th-century work "Parzival" by Wolfram von Eschenbach was a veiled account of the Cathars. The philosopher and Nazi government official Alfred Rosenberg speaks favourably of the Cathars in "The Myth of the Twentieth Century".