ohemian Rhapsody is a saga, or series of stories, that takes place within the world of Mythic Europe, created for role-playing using the Ars Magica 5th Edition game rules published by Atlas Games. These stories concern the lives and adventures of a group of mystical wizards, members of the mythic Order of Hermes.

  
       
  The Order of Hermes is an order of wizards spanning the whole of Mythic Europe, bound by an oath, the Lex Hermae or Code of Hermes, that keeps them from fighting each other (too much) or trying to rule the mundane population of Mythic Europe.  Within the Order of Hermes, many Magi choose to gather together in small groups called Covenants.  A Covenant is a group of Magi bound together by an agreement going beyond the Code of Hermes.

The central covenant in the Bohemian Rhapsody Saga is Porta Germaniae, the home of the central characters in the saga.