It is about King Arthur and some history.

Arthur: Fact, Fiction or Legend? Sir Thomas Malory wrote regarding the legendary exploits of King Arthur. Arthur was often debated as fact or fictional. (see Appendix I) He was the legendary British King who appeared in Medieval romances as the sovereign of a knightly fellowship. It has not been certain, however, if Arthur was fact, fiction or legend. An overview of the history of the times in which Malory and Arthur lived has aided readers …

…Legend. Edinburgh: Oliver and Boyd, 1968. Samples, Susan. "Guinevere: A Re-Appraisal." Arthurian Interpretations 3.2. 1989: 106-18. "Templar." Encyclopedia Britannica. 2003. Encyclopedia Britannica Premium Service. November 24, 2003 http://www.britannica.com/eb/article?eu=73501. Weston, Jessie L. The Quest of the Holy Grail. 1913; rpt. New York: Haskell House, 1965. Waite, Arthur Edward. The Holy Grail: The Galahad Quest in the Arthurian Literature. New Hyde Park, New York: University Books, 1961. Weston, Jessie L. The Quest of the Holy Grail. New York: Haskell House, 1965.