Arpajon ( (listen)) is a commune in the Essonne department in the Île-de-France region of northern France. The inhabitants of the commune are known as Arpajonnais or Arpajonnaises. The commune has been awarded three flowers by the National Council of Towns and Villages in Bloom in the Competition of cities and villages in Bloom. The Gallo-Romans placed a castrum to monitor the passage of along the Orge between Lutèce and Cenabum. The castrum became Chastres around the year 250 then Châtres (sometimes Châtres-sous-Montlhery) in the 17th century with the reform of spelling and the appearance of the circumflex in place of the silent "s". Chastres could also mean "land of rivers" in "the barbarian language". More information...
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