Was king Arthur a man or a myth? What did the Beheading Game mean and why was it necessary to kill the king? How did Medieval authors, like Chrétien de Troyes, absorb and reproduce Celtic themes? How did myth and folklore cohabit? And what about the grail, what was it? These are some questions exposed in this book. The author clarifies Roger Sherman Loomis’ Celtic obsession and she offers the reader the Loomisian Celtic thesis.