The discrepancy between this and the other Grail romances is most startling.
These were hard-headed men of affairs - men who would not lightly embark on joyous ventures, or seek for an ideal San Grail; nor were the popes, doomed to the Babylonian captivity for seventy long years at Avignon, able to call down the spark from on high which should consume all earthly ambitions in one great act of sacrifice.
A noticeable feature of the story is the uncertainty as to the hero's parentage; the mother is always a lady of rank, a queen in her own right, or sister of kings (as a rule of the Grail kings); but the father's rank varies, he is never a king, more often merely a valiant knight, and in no instance does he appear to be of equal rank with his wife.
The connexion of the story with Arthur and his court brought about a speedy and more important development, the precise steps of which are not yet clear: Perceval became the hero of the Grail quest, in this ousting Gawain, to whom the adventure originally belonged, and the Perceval became merged in the Grail tradition.
Of the Perceval-Grail romances the oldest from the point of view of manuscript preservation is the Perceval or Conte del Graal of Chretien de Troyes.