Pyrénées-Orientales corresponds almost exactly to the pre-Revolutionary province of Roussillon , but it also includes Fenolheda , a small piece of territory which had formerly been on the southern edge of Languedoc .
Pyrénées-Orientales was formed by the province of Roussillon and Fenouillèdes ( Occitan : Fenolheda ) , a small piece of territory which had formerly been on the southern edge of Languedoc .