The novels of the French esoteric writer Maurice Magre (1877-1941) “The Blood of Toulouse” (1931) and “The Treasure of the Albigensians” (1938) are dedicated to the Albigensian movement of the 12th-13th centuries. The author not only reproduces the historical chronicle of the tragic events that took place in the south of France, where papal inquisitors eradicated the “Albigensian heresy” with fire and sword, but, analyzing the Gnostic and Manichaean roots of the Cathar Church of Love, reveals its deepest and most hidden secrets. Having access to the rarest medieval manuscripts, Magr knew well that, according to apocryphal legends, the Cathars had long been the guardians of the Holy Grail...