The story of the Holy Grail has gripped the imaginations of millions since it first appeared in medieval romances, among them Wolfram von Eschenbach's Middle High German Parzival (c. 1210). Strangely, the Grail is identified in Parzival not as a cup or dish, but as a stone. This oddity is usually interpreted merely as further evidence of the difficulty of discerning the true sources of the Grail legend.
G. Ronald Murphy seeks to illuminate this...