Individual #Prussia__Preussen  a former kingdom in north-central Europe including present-day northern Germany and northern Poland; "in the 19th century Prussia led the economic and political unification of the German states"
  instance of:  #geographical_area
  member:  #Prussian
  part of:  #Germany  #Poland
  part:  #Brandenburg  the territory of an Elector of the Holy Roman Empire that expanded to become the kingdom of Prussia in 1701

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