The word "office" stems from the Latin "officium" and its equivalents in various Romance languages. An officium was not necessarily a place, but often referred instead to human staff members of an organization, or even the abstract notion of a formal position like a magistrate. The elaborate Roman bureaucracy would not be equaled for centuries in the West after the fall of Rome, with areas partially reverting to illiteracy.[citation needed] Further east, the Byzantine Empire and varying Islamic caliphates preserved a more sophisticated administrative culture.[citation needed]