In Peter Berling's pentalogy The Children of the Grail and in Julia Navarro's La sangre de los innocentes, the siege of Montségur is described.
This identification has been favoured in more recent years by Otto Rahn in his Crusade Against the Grail, Peter Berling in various works in his series The Children of the Grail, Jean Blum in Mystère et message des Cathares, and Joaquín Javaloys in his historical novel Yo, Parsifal: el mítico caballero del Grial.
The Children of the Grail (German Die Kinder des Gral) is a historical novel published in 1996 and a series based on it written by Peter Berling.
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