Historical fantasy is a category of fantasy and genre of historical fiction that incorporates fantastic elements into a more "realistic" narrative. There is much crossover with other subgenres of fantasy; those classed as Arthurian, Celtic, or Dark Ages could just as easily be placed in historical fantasy. Stories fitting this classification generally take place prior to the 20th century.

Vathek is a Gothic novel written by William Beckford. It was composed in French beginning in 1782, and then translated into English by Reverend Samuel Henley in which form it was first published in 1786 without Beckford's name as An Arabian Tale, From an Unpublished Manuscript, claiming to be translated directly from Arabic. The first French edition, titled simply as Vathek, was published in December 1786. In the twentieth century some editions include The Episodes of Vathek, three related tales intended by Beckford to be so incorporated, but omitted from the original edition and published separately long after his death.