Wikimedia Commons has media related to Fictional history.
This category is for articles about the histories of fictional worlds which exist in literature, film, and other story-telling media, but not in reality.
It can be used for fictional histories of the real world that do not qualify as alternate history (fictitious histories which diverge from real history before the time of writing) or future history (fictitious histories of the future which do not deviate from real history as of the time of writing).