Prester John

Prester John, legendary Christian ruler of the East, popularized in medieval chronicles and traditions as a hoped-for ally against the Muslims. Believed to be a Nestorian (i.e., a member of an independent Eastern Christian church that did not accept the authority of the patriarch of Constantinople) and a king-priest reigning “in the Far East beyond Persia and Armenia,” Prester John was the centre of a number of legends that hark back to the writings of...