pn (historical) The (w|Flanders (county)|Countship of Flanders), of varying extent.
pn A subnational state in the north of federal Belgium, the institutional merger of a territorial region and the Dutch language 'community' which also has/shares some authority in the capital region Brussels.
pn Short for French Flanders, a former province of the French kingdom on territory taken from the above countship, now constituting the French department Nord.