Départements, yes. Départements are segments of Régions, and are
themselves divided into Arrondissements, the Arrondissements into
Cantons and the Cantons into Communes.
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Paris. Districts are called here 'arrondissements'.
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The are called Arrondissements. There are 20 arrondissements,
and you refer to them as the 1st arrondissement, 2nd arrondissement
etc.
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Paris is divided into twenty regions known as arrondissements
municipaux.