In Arthurian legend, the pure knight who achieved a vision of God through the Holy Grail. The illegitimate son of Lancelot and the princess Elaine, he alone was worthy to sit in the Siege Perilous at the Round Table, reserved for the one destined to succeed in the quest for the Grail. Unlike his father, who was given to earthly and adulterous love, Galahad was chaste and filled with spiritual fervour. By finding the Grail, he healed the Fisher King and brought fertility back to the land. He appears in many Arthurian romances, notably in Sir Thomas Malory's Morte Darthur. See alsoPerceval.